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World map. Europe, Russia, most of North America, parts of southern South America and southern Australia, and a few other places use DST. Most of equatorial Africa and a few other places near the equator have never used DST. The rest of the land mass is marked as formerly using DST.
.
Although not used by most of the world's people, daylight saving time is common in high latitudes.
^ Early Daylight Saving Time a bust .
  • Early Daylight Saving Time a bust - Review-Journal eForum 19 January 2010 9:54 UTC eforum.reviewjournal.com [Source type: FILTERED WITH BAYES]

^ Daylight Saving Time prevents crime.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Saving Time, Saving Energy 19 January 2010 9:54 UTC www.nationalatlas.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ Daylight saving time.
  • Daylight Saving Time Update 19 January 2010 9:54 UTC forum.brighthand.com [Source type: FILTERED WITH BAYES]

     DST observed      DST no longer observed      DST never observed
.Daylight saving time (DST; also summer time in British English—see Terminology) is the practice of temporarily advancing clocks so that afternoons have more daylight and mornings have less.^ Daylight savings time clipart and illustrations .
  • Daylight savings time Clipart EPS Images. 4 Daylight savings time clip art vector illustrations available to search from over 15 royalty free illustration publishers. 12 September 2009 11:57 UTC www.fotosearch.com [Source type: General]

^ Early Daylight Saving Time a bust .
  • Early Daylight Saving Time a bust - Review-Journal eForum 19 January 2010 9:54 UTC eforum.reviewjournal.com [Source type: FILTERED WITH BAYES]

^ Daylight Saving Time prevents crime.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Saving Time, Saving Energy 19 January 2010 9:54 UTC www.nationalatlas.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

.Typically clocks are adjusted forward one hour near the start of spring and are adjusted backward in autumn.^ In fall, turn clocks backward one hour.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Saving Time, Saving Energy 19 January 2010 9:54 UTC www.nationalatlas.gov [Source type: FILTERED WITH BAYES]

^ Most Americans will set their clocks forward one hour this weekend.
  • SurfWax: News, Reviews and Articles On Daylight Saving Time 19 November 2009 18:38 UTC news.surfwax.com [Source type: News]

^ Federal LAW? To SPRING FORWARD one hour?
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

[1] .Modern DST was first proposed in 1895 by George Vernon Hudson.^ Modern DST was first proposed in 1895 by George Vernon Hudson, a New Zealand entomologist.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ The first serious propositions came independently from different sides of the world a century later: from New Zealander George Hudson in 1895, and Englishman William Wennett in 1907.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

[2] .Many countries have used it since then; details vary by location and change occasionally.^ Many countries have used it since then; details vary by location and change occasionally.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Daylight Saving Time observances vary between countries and regions and are subject to change by national and provincial governments.
  • About Daylight Saving Time changes in 2007 19 January 2010 9:54 UTC support.apple.com [Source type: General]

^ Since 1966, the feds have ordained when and how clocks will change throughout the country, except for Arizona and Hawaii.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

The practice is controversial.[1] .Adding daylight to afternoons benefits retailing, sports, and other activities that exploit sunlight after working hours,[3] but causes problems for farming, evening entertainment and other occupations tied to the sun.^ Adding daylight to afternoons benefits retailing, sports, and other activities that exploit sunlight after working hours, but causes problems for farming, evening entertainment and other occupations tied to the sun.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ The nays had it until April when a state law was enacted requiring Indiana next year to join 47 other states that “fall back” and “spring forward.” Arizona and Hawaii do not observe DST because additional evening sunlight would not benefit their sun-saturated climates.
  • Daylight-saving time dawns in Indiana 19 January 2010 9:54 UTC www.stateline.org [Source type: News]

^ When the extension of daylight-saving time was proposed by Mr. Markey, he cited studies that noted "less crime, fewer traffic fatalities, more recreation time and increased economic activity" with the extra sunlight in the evening.
  • Daylight Saving Wastes Energy, Study Says - WSJ.com 19 January 2010 9:54 UTC online.wsj.com [Source type: News]

[4][5] .Traffic fatalities are reduced when there is extra afternoon daylight.^ Traffic fatalities are reduced when there is extra afternoon daylight; its effect on health and crime is less clear.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ When the extension of daylight-saving time was proposed by Mr. Markey, he cited studies that noted "less crime, fewer traffic fatalities, more recreation time and increased economic activity" with the extra sunlight in the evening.
  • Daylight Saving Wastes Energy, Study Says - WSJ.com 19 January 2010 9:54 UTC online.wsj.com [Source type: News]

^ Even if there were no energy savings at all, it would be worth it to me to have an extra hour of daylight at the end of the day.
  • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

[6] .Its effect on health and crime is less clear.^ Traffic fatalities are reduced when there is extra afternoon daylight; its effect on health and crime is less clear.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

.Although an early goal of DST was to reduce evening usage of incandescent lighting, formerly a primary use of electricity,[7] modern heating and cooling usage patterns differ greatly, and research about how DST currently affects energy use is limited or contradictory.^ How DST saves energy is beyond me.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ Although an early goal of DST was to reduce evening usage of incandescent lighting, formerly a primary use of electricity, modern heating and cooling usage patterns differ greatly, and research about how DST currently affects energy use is limited and often contradictory.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Introduced in 1918 as a wartime measure to conserve resources, daylight saving time is favored by many modern Americans because it adds more light in the evenings and has a positive impact on energy conservation (since we're outside more and use less electricity in the house).
  • Montefiore Sleep Expert Provides Tips to Help Transition to Daylight Saving Time 19 January 2010 9:54 UTC www.montefiore.org [Source type: Academic]

[8]
.DST's occasional clock shifts present other challenges.^ DST's occasional clock shifts present other challenges.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Updated August 2009 Daylight Saving Time (DST) or Summer Time, the shifting of clocks by one hour, is not observed uniformly around the world.
  • Daylight Saving Time (DST) | Update Phone Time Zone | Windows Mobile 19 January 2010 9:54 UTC www.microsoft.com [Source type: General]

^ Law enforcement, the military, hospitals, and others also have to deal with the confusion of keeping and recording "accurate" time records when the clocks suddenly shift an hour.
  • SkyandTelescope.com - News Blog - Daylight-Saving Time? Bah, Humbug! 19 January 2010 9:54 UTC www.skyandtelescope.com [Source type: General]

.They complicate timekeeping, and can disrupt meetings, travel, billing, recordkeeping, medical devices, heavy equipment,[9] and sleep patterns.^ One of the arguments against such changes has been that they disrupt sleep patterns, but in today's computer-dependent world, the bigger worries might be tech-related.
  • Daylight time will be early -- get set / Small businesses, consumers expected to be hardest hit by change 19 January 2010 9:54 UTC www.sfgate.com [Source type: News]

[10] .Software can often adjust computer clocks automatically, but this can be limited and error-prone, particularly when DST rules change.^ Many computer-based systems can adjust their clocks automatically, but this can be limited and error-prone, particularly when DST rules change.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ All devices that automatically adjust Daylight Saving Time and that support operating systems or rely on a local time zone that observes DST will be affected by the 2007 DST change.
  • HP Daylight Saving Time Page 19 January 2010 9:54 UTC h10072.www1.hp.com [Source type: FILTERED WITH BAYES]

^ The change is wreaking havoc on computer techs the world over, who are just now getting around to updating software with patches to adjust the DST date (even though we've known about this for 2 years).
  • Daylight "Saving" Time...What Does It Save, Anyway? | Wise Bread 19 January 2010 9:54 UTC www.wisebread.com [Source type: General]

[11]

Contents

Origin

A water clock. A small human figurine holds a pointer to a cylinder marked by the hours. The cylinder is connected by gears to a water wheel driven by water that also floats a part that supports the figurine.
In this ancient water clock, a series of gears rotated a cylinder to display hour lengths appropriate for each day's date.
.Although not punctual in the modern sense, ancient civilizations adjusted daily schedules to the sun more flexibly than modern DST does, often dividing daylight into twelve equal hours regardless of day length, so that each daylight hour was longer during summer.^ In summer tne daylight hours far exceed the business day - adjusted or not.

^ The time change extends to the hours of both State and Federal courthouses in these counties, which operate on Daylight Saving Time during spring, summer, and fall, and puts them out of step with the rest of Indiana in the counties that observe Daylight Saving Time.

^ The number of daylight hours per day in the annual cycle doesn't change, just the measurement system we chose to use.

[12] .For example, Roman water clocks had different scales for different months of the year: at Rome's latitude the third hour from sunrise, hora tertia, started by modern standards at 09:02 solar time and lasted 44 minutes at the winter solstice, but at the summer solstice it started at 06:58 and lasted 75 minutes.^ The exact times of the solstices change from year to year.
  • Solar Calculator Glossary 19 January 2010 9:54 UTC www.srrb.noaa.gov [Source type: FILTERED WITH BAYES]

^ This not only kept England on the same time as the European continent, but, given the location of the island, gave summer evenings which lasted until after 10 PM, and less depressing winter days.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ Putting Local Time ahead of Solar Time during the Summer is commonly said to have first been suggested (apparently frivolously) in an essay by Benjamin Franklin (Paris, 1784).
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[13] .After ancient times, equal-length civil hours eventually supplanted unequal, so civil time no longer varies by season.^ The length of Winter Time will vary.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Equatorial and tropical countries (lower latitudes) don't observe Daylight Saving Time since the daylight hours are similar during every season, so there's no advantage to moving clocks forward during the summer.
  • Saving Time, Saving Energy 19 January 2010 9:54 UTC www.nationalatlas.gov [Source type: FILTERED WITH BAYES]

^ Double Summer Time (BDST/DBST) has been used in the UK, during 1941-45 and 1947; and between Summer 1940 and Summer 1945, civil time in the Winter was an hour ahead of GMT. BDST is no longer allowed.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

.Unequal hours are still used in a few traditional settings, such as some Mount Athos monasteries[14] and some Jewish ceremonies.^ Up until 2007, it ended in October, and some computers and electronic devices (such as the L.A. Times-tether Blackberry) are still operating under that assumption.
  • Rejoice! Daylight saving time is ending | Booster Shots | Los Angeles Times 19 January 2010 9:54 UTC latimesblogs.latimes.com [Source type: General]

^ If some advance appointments are already set to occur during that period, all such appointments will be "bumped" by one hour.
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

^ Some time zones and regions within time zones don't participate in daylight-saving time, and a few places divide their region into half-hour zones.

[15]
A seated older Benjamin Franklin from the waist up, with body facing to viewer's right but head turned toward the artist. Franklin's waistcoat is bulging a bit, his expression is inscrutable, and his hair hangs down to his shoulders.
Benjamin Franklin suggested firing cannons at sunrise to waken Parisians.
.During his time as an American envoy to France, Benjamin Franklin, author of the proverb, "Early to bed, and early to rise, makes a man healthy, wealthy and wise", anonymously published a letter suggesting that Parisians economize on candles by rising earlier to use morning sunlight.^ "Early to bed and early to rise Makes a man healthy and wealthy and wise".
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ The American family is not addicted to morning exercise through early rising.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ During his time as America's envoy to France, Benjamin Franklin once famously (but anonymously) wrote that Parisians could economize on candles by firing cannons at sunrise to get the populace on their feet sooner during summer.
  • SkyandTelescope.com - News Blog - Daylight-Saving Time? Bah, Humbug! 19 January 2010 9:54 UTC www.skyandtelescope.com [Source type: General]

[16] .This 1784 satire proposed taxing shutters, rationing candles, and waking the public by ringing church bells and firing cannons at sunrise.^ Franklin didn't propose setting clocks forward, instead he satirically suggested levying a tax on window shutters, ringing church bells at sunrise and, if that didn't work, firing cannons down the street in order to rouse Parisians out of their beds earlier.
  • Daylight Saving Wastes Energy, Study Says - WSJ.com 19 January 2010 9:54 UTC online.wsj.com [Source type: News]

^ He says, "Every morning, as soon as the sun rises, let all the bells in every church be set ringing; and if that is not sufficient, let cannon be fired in every street, to wake the sluggards effectually, and make them open their eyes to see their real interest".
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ During his time as America's envoy to France, Benjamin Franklin once famously (but anonymously) wrote that Parisians could economize on candles by firing cannons at sunrise to get the populace on their feet sooner during summer.
  • SkyandTelescope.com - News Blog - Daylight-Saving Time? Bah, Humbug! 19 January 2010 9:54 UTC www.skyandtelescope.com [Source type: General]

[17] .Franklin did not propose DST; like ancient Rome, 18th-century Europe did not keep precise schedules.^ This did not change or disable the hard coded DST function so it still executed as scheduled Sunday.
  • Daylight Saving Time – Snafu ~ Chris Pirillo 19 January 2010 9:54 UTC chris.pirillo.com [Source type: General]

.However, this soon changed as rail and communication networks came to require a standardization of time unknown in Franklin's day.^ An exception was 1996, when the change back to Standard Time took place on Sunday night instead of Saturday night to avoid conflicts with the Jewish New Year.
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC webexhibits.org [Source type: News]
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC www.webexhibits.org [Source type: News]

^ IDT; and the change back to Standard Time was on a Friday morning from 2:00 a.m.
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC webexhibits.org [Source type: News]
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC www.webexhibits.org [Source type: News]

^ While European nations have been taking advantage of the time change for decades, in 1996 the European Union (EU) standardized a EU-wide "summertime period."
  • Saving Time, Saving Energy 19 January 2010 9:54 UTC www.nationalatlas.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

[18]
Fuzzy head-and-shoulders photo of a 40-year-old man in a cloth cap and mustache.
G.V. Hudson invented modern DST, proposing it first in 1895.
.Modern DST was first proposed by the New Zealand entomologist George Vernon Hudson, whose shift-work job gave him leisure time to collect insects, and made him aware of the value of after-hours daylight.^ Modern DST was first proposed in 1895 by George Vernon Hudson, a New Zealand entomologist.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Yet in those four words is a whole collection of trivia, facts and common sense about Daylight Saving Time.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Saving Time, Saving Energy 19 January 2010 9:54 UTC www.nationalatlas.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

^ The exception to this is in the Navajo Nation Community of Arizona , which observes Daylight-Saving Time, where the time is shifted forward by 1 hour, resulting in a 6 hours difference behind GMT. The Hopi Nation, within the Navajo Reservation, does not operate time changes."

[2] .In 1895 he presented a paper to the Wellington Philosophical Society proposing a two-hour daylight-saving shift,[19] and after considerable interest was expressed in Christchurch, New Zealand he followed up in an 1898 paper.^ What countries follow daylight-saving time?
  • Daylight-Saving Time - CNN.com 12 September 2009 11:57 UTC www.cnn.com [Source type: News]
  • Daylight-Saving Time - CNN.com 12 September 2009 11:57 UTC www.cnn.com [Source type: News]
  • Daylight-Saving Time - CNN.com 19 January 2010 9:54 UTC www.cnn.com [Source type: News]

^ Adjust the time to the new daylight saving time.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ Daylight-saving time is a system established to reduce electricity usage by extending daylight hours (clocks are set ahead one hour).
  • Daylight-Saving Time - CNN.com 12 September 2009 11:57 UTC www.cnn.com [Source type: News]
  • Daylight-Saving Time - CNN.com 12 September 2009 11:57 UTC www.cnn.com [Source type: News]
  • Daylight-Saving Time - CNN.com 19 January 2010 9:54 UTC www.cnn.com [Source type: News]

[20] .Many publications incorrectly credit DST's invention to the prominent English builder and outdoorsman William Willett,[21] who independently conceived DST in 1905 during a pre-breakfast ride, when he observed with dismay how many Londoners slept through a large part of a summer day.^ Indiana's north-south location will affect how long the days are in the summer and might very well lead to different results in different areas.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]

^ Summer Time was advocated in a pamphlet ( text of 1st edition, July 1907 ( + ), PDF of 19th edition, March 1914 ) by William Willett * (1856-1915) (a builder; of Chislehurst, Bromley, London; Blue Plaque ); he had the idea in 1905, while riding on a nearby common.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ It sounds to me like the people who made this decision have no idea of how many consumer devices they are making useless without extra work.
  • Daylight-saving change could confuse gadgets - CNET News 19 January 2010 9:54 UTC news.cnet.com [Source type: FILTERED WITH BAYES]

[22] An avid golfer, he also disliked cutting short his round at dusk.[23] .His solution was to advance the clock during the summer months, a proposal he published two years later.^ During the summer months, Russian clocks are advanced another hour ahead.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

^ France has just recently, within the past ten days, passed legislation making it effective during the summer months for all time, instead of confining it to the one year period.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ Willett wanted to move the clock ahead by 80 minutes in four moves of 20 minutes each during the spring and summer months.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

[24]
.As described in Politics below, Willett lobbied unsuccessfully for the proposal in the UK until his death in 1915. Starting on 30 April 1916, Germany, its World War I allies, and their occupied zones were the first European nations to use Willett's invention as a way to conserve coal during wartime.^ The practice first took hold during World Wars I and II but quickly became optional for individual states during peacetime.
  • Daylight-saving change could confuse gadgets - CNET News 19 January 2010 9:54 UTC news.cnet.com [Source type: FILTERED WITH BAYES]

^ It could be useful to know in which year each European country finally started using the current EU change date rules ( i.e.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Daylight Savings History of Daylight Saving Time Follows the history of daylight saving time from when it was first conceived by Benjamin Franklin to its use in about seventy countries around the world.
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

Britain, most of its allies, and many European neutrals soon followed suit. .Russia and a few other countries waited until the next year and the United States adopted it in 1918. Since then, the world has seen many enactments, adjustments, and repeals.^ Readings from counties that had already adopted daylight-saving time provided a control group that helped them to adjust for changes in weather from one year to the next.
  • Daylight Saving Wastes Energy, Study Says - WSJ.com 19 January 2010 9:54 UTC online.wsj.com [Source type: News]

^ Since Western Australia has also decided to adopt a 3-year “Summer Time” trial, all previously released patches for DST are not valid.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ United States urging the early enactment of the identical Bills, House No.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

[25]

How it works

Diagram of a clock showing a transition from 2:00 to 3:00.
When DST starts in central Europe, clocks advance from 02:00 CET to 03:00 CEST.
Diagram of a clock showing a transition from 3:00 to 2:00.
When DST ends in central Europe, clocks retreat from 03:00 CEST to 02:00 CET. Other regions switch at different times.
.In a typical case where a one-hour shift occurs at 02:00 local time, in spring the clock jumps forward from 02:00 standard time to 03:00 DST and that day has 23 hours, whereas in autumn the clock jumps backward from 02:00 DST to 01:00 standard time, repeating that hour, and that day has 25 hours.^ In fall, turn clocks backward one hour.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Saving Time, Saving Energy 19 January 2010 9:54 UTC www.nationalatlas.gov [Source type: FILTERED WITH BAYES]

^ Most Americans will set their clocks forward one hour this weekend.
  • SurfWax: News, Reviews and Articles On Daylight Saving Time 19 November 2009 18:38 UTC news.surfwax.com [Source type: News]

^ Federal LAW? To SPRING FORWARD one hour?
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

A digital display of local time does not read 02:00 exactly at the shift, but instead jumps from 01:59:59.9 either forward to 03:00:00.0 or backward to 01:00:00.0. In this example, a location observing UTC+10 during standard time is at UTC+11 during DST; conversely, a location at UTC−10 during standard time is at UTC−9 during DST.
.Clock shifts are usually scheduled near a weekend midnight to lessen disruption to weekday schedules.^ Twice-a-year clock shifts cause confusion, disrupt your sleep, and, according to Swedish researchers, might even increase your risk of a heart attack.
  • SkyandTelescope.com - News Blog - Daylight-Saving Time? Bah, Humbug! 19 January 2010 9:54 UTC www.skyandtelescope.com [Source type: General]

.A one-hour shift is customary, but Australia's Lord Howe Island uses a half-hour shift.^ Lord Howe Island ( Australia ) has a half-hour time shift.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Updated August 2009 Daylight Saving Time (DST) or Summer Time, the shifting of clocks by one hour, is not observed uniformly around the world.
  • Daylight Saving Time (DST) | Update Phone Time Zone | Windows Mobile 19 January 2010 9:54 UTC www.microsoft.com [Source type: General]

^ Instead of shifting the ciphers one hour we all could shift our activities one hour - if it makes sense.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

[26] .Twenty-minute and two-hour shifts have been used in the past.^ All-day events will shift and span two days because these events are associated with 24 specific hours rather than an individual date.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

.Coordination strategies differ when adjacent time zones shift clocks.^ Law enforcement, the military, hospitals, and others also have to deal with the confusion of keeping and recording "accurate" time records when the clocks suddenly shift an hour.
  • SkyandTelescope.com - News Blog - Daylight-Saving Time? Bah, Humbug! 19 January 2010 9:54 UTC www.skyandtelescope.com [Source type: General]

^ That is, the DST clock change settings for the affected time zones were set at 0.
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

^ The World Clock - current times around the world Personal World Clock Meeting Planner Time Zone Converter .
  • Daylight Saving Time start and end times first half of 2008 12 September 2009 11:57 UTC www.timeanddate.com [Source type: General]

.The European Union shifts all at once, at 01:00 UTC; for example, Eastern European Time is always one hour ahead of Central European Time.^ Half Hour, once and for all .
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ While we in Mississippi and most other states all set our clocks ahead one hour Saturday night or this morning, people in Hawaii and Arizona did not.
  • Meridian Star - We have golf to thank for Daylight Saving Time 19 January 2010 9:54 UTC www.meridianstar.com [Source type: General]

^ The rest stayed on standard time all year, in part because farmers resisted the prospect of having to work an extra hour in the morning dark.
  • Daylight Saving Wastes Energy, Study Says - WSJ.com 19 January 2010 9:54 UTC online.wsj.com [Source type: News]

[27] .Most of North America shifts at 02:00 local time, so its zones do not shift at the same time; for example, Mountain Time can be temporarily either zero or two hours ahead of Pacific Time.^ The time zones are shifts from UTC, and DST is just a 1 hour change of time zone.
  • Daylight-saving change could confuse gadgets - CNET News 19 January 2010 9:54 UTC news.cnet.com [Source type: FILTERED WITH BAYES]

^ Putting Local Time ahead of Solar Time during the Summer is commonly said to have first been suggested (apparently frivolously) in an essay by Benjamin Franklin (Paris, 1784).
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ The only place in North America I am aware of which stays on fast time all year is the Province of Saskatchewan, which for them is Central Standard Time.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

In the past, Australian districts went even further and did not always agree on start and end dates; for example, in 2008 most DST-observing areas shifted clocks forward on October 5 but Western Australia shifted on October 26.[28] In some cases only part of a country shifts; for example, in the U.S., Hawaii and most of Arizona do not observe DST.[29]
.Start and end dates vary with location and year.^ Therefore, any configuration for daylight saving must include the parameters for the start and end dates.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ DST Start and End date changes beginning March 2007 .
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

^ It could be useful to know in which year each European country finally started using the current EU change date rules ( i.e.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

.Since 1996 European Summer Time has been observed from the last Sunday in March to the last Sunday in October; previously the rules were not uniform across the European Union.^ Tasmania changed at that time on the first Sunday of October and last Sunday of March.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Last Sunday in October 2008 to Last Sunday in March 2009 * .
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ In the EU, Summer Time is used from the last Sunday in March until the last Sunday in October.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[27] .Starting in 2007, most of the United States and Canada observe DST from the second Sunday in March to the first Sunday in November, almost two-thirds of the year.^ DST will end later on the first Sunday of November (November 2, 2008).
  • Preparing for daylight saving time changes in 2008 12 September 2009 11:57 UTC support.microsoft.com [Source type: FILTERED WITH BAYES]

^ DST Start and End date changes beginning March 2007 .
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

^ The adjustment will end on the first Sunday in November.
  • SurfWax: News, Reviews and Articles On Daylight Saving Time 19 November 2009 18:38 UTC news.surfwax.com [Source type: News]

[30] .The 2007 U.S. change was part of the Energy Policy Act of 2005; previously, from 1987 through 2006, the start and end dates were the first Sunday in April and the last Sunday in October, and Congress retains the right to go back to the previous dates now that an energy-consumption study has been done.^ It was observed from 12:00 midnight on the first Sunday in April through 12:00 midnight on the first Sunday in October 2002.
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC webexhibits.org [Source type: News]
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC www.webexhibits.org [Source type: News]

^ DST Start and End date changes beginning March 2007 .
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

^ Tasmania changed at that time on the first Sunday of October and last Sunday of March.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[31]
Time graph. <a name=.The horizontal axis shows dates in 2008. The vertical axis shows the UTC offsets of eastern Brazil and eastern U.S. The difference between the two starts at 3 hours, then goes to 2 hours on February 17 at 24:00 Brazil eastern time, then goes to 1 hour on March 9 at 02:00 U.S. eastern time."^ Differences in appointment times between 5.x and 4.x users .
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

^ When this law goes into effect in March 2007, DST will start three weeks earlier (2:00 A.M. on the second Sunday in March) and will end one week later (2:00 A.M. on the first Sunday in November) than what had traditionally occurred.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ Opponents say it would make communications with the Lower 48 states even more challenging by adding another hour's difference from March to November.
  • Bills would end daylight saving time, establish 'Marmot Day': Legislature | adn.com 19 January 2010 9:54 UTC www.adn.com [Source type: News]

src="http://images-mediawiki-sites.thefullwiki.org/00/3/3/8/21053561220602960.png" width="220" height="102" class="thumbimage" />
In early 2008 central Brazil was one, two, or three hours ahead of eastern U.S., depending on the date.
.Beginning and ending dates are the reverse in the southern hemisphere.^ DST Start and End date changes beginning March 2007 .
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

^ The Daylight Saving Time begin and end dates must be set correctly for each time zone used by a domain or post office in your system.
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

^ But the beginning and ending dates are often different than those used in the United States.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

.For example, mainland Chile observes DST from the second Saturday in October to the second Saturday in March, with transitions at 24:00 local time.^ Start: Last Sunday in March at 2 am local time End: Last Sunday in October at 2 am local time .
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC webexhibits.org [Source type: News]
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC www.webexhibits.org [Source type: News]

^ When this law goes into effect in March 2007, DST will start three weeks earlier (2:00 A.M. on the second Sunday in March) and will end one week later (2:00 A.M. on the first Sunday in November) than what had traditionally occurred.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ For example, the state of Arizona does not observe DST. From a DST point of view, Arizona is logically located in Mountain Standard Time for part of the year, and Pacific Daylight Time for the remainder of the year.
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

[32] .The time difference between the United Kingdom and mainland Chile may therefore be three, four, or five hours, depending on the time of year.^ Differences in appointment times between 5.x and 4.x users .
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

^ The rest stayed on standard time all year, in part because farmers resisted the prospect of having to work an extra hour in the morning dark.
  • Daylight Saving Wastes Energy, Study Says - WSJ.com 19 January 2010 9:54 UTC online.wsj.com [Source type: News]

^ A real Perth scorcher will peak when the sea breeze fails at around three to four in the afternoon, standard time.
  • Western Australia: Daylight saving - your opinion? 12 September 2009 11:57 UTC blogs.abc.net.au [Source type: General]

Map of the time zone boundaries of the world. <a name=.Generally the borders run north-south and there are about 24 zones, but there are many exceptions where the borders follow national boundaries and a few half-hour or quarter-hour zones exist."^ Every one of the chambers of commerce, and there were about forty of them, might be summarized as follows: .
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ For few days, the hour we lose when we spring forward, simulates the western edge of a time zone at least for parents of small children.
  • SurfWax: News, Reviews and Articles On Daylight Saving Time 19 November 2009 18:38 UTC news.surfwax.com [Source type: News]

^ Cons: Potential risks of both the Exchange and Outlook Time Zone Update tools; all users will have to run the tool and risks of running the Exchange Time Zone Data Update tool still exist.
  • Preparing for daylight saving time changes in 2008 12 September 2009 11:57 UTC support.microsoft.com [Source type: FILTERED WITH BAYES]

src="http://images-mediawiki-sites.thefullwiki.org/11/3/5/5/95630593626110051.png" width="370" height="198" class="thumbimage" />
Time zones often lie west of their idealized boundaries, resulting in year-round DST.
.Western China, Iceland, and other areas skew time zones westward, in effect observing DST year-round without complications from clock shifts.^ I wouldn't mind if DST stayed effect all year round.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Removes DST for Western Australia time zone in 2009.
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

^ That is, the DST clock change settings for the affected time zones were set at 0.
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

.For example, Saskatoon, Saskatchewan, is at 106° 39′ W longitude, slightly west of center of the idealized Mountain Time Zone (105° W), but the time in Saskatchewan is Central Standard Time (90° W) year-round, so Saskatoon is always about 67 minutes ahead of mean solar time.^ What the time zone changes mean for users .
  • Preparing for daylight saving time changes in 2008 12 September 2009 11:57 UTC support.microsoft.com [Source type: FILTERED WITH BAYES]

^ There is nothing "standard" about Standard Time.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ The rest stayed on standard time all year, in part because farmers resisted the prospect of having to work an extra hour in the morning dark.
  • Daylight Saving Wastes Energy, Study Says - WSJ.com 19 January 2010 9:54 UTC online.wsj.com [Source type: News]

[33] .Conversely, northeast India and a few other areas skew time zones eastward, in effect observing negative DST.[34] The United Kingdom and Ireland experimented with year-round DST from 1968 to 1971 but abandoned it because of its unpopularity, particularly in northern regions.^ Daylight Saving Time for other years .
  • Daylight Saving Time Around the World 2009 19 January 2010 9:54 UTC www.timeanddate.com [Source type: Original source]

^ Over the years, Pakistan has experimented with Summer Time.
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC webexhibits.org [Source type: News]
  • When is Daylight Saving Time worldwide? 12 September 2009 11:57 UTC www.webexhibits.org [Source type: News]

^ California actually petitioned Congress for year-round DST but that was before 9/11 and Iraq so Congress probably has other things on their minds these days :-( DST has been happening since 1916 (in England) and it has been proven to save energy.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

[35]
.Western France, Spain, and other areas skew time zones and shift clocks, in effect observing DST in winter with an extra hour in summer.^ When DST is not observed, it is called standard time, normal or winter time.
  • Daylight Saving Time (DST) / Summer Time of World Countries 19 January 2010 9:54 UTC timezoneguide.com [Source type: FILTERED WITH BAYES]

^ Removes DST for Western Australia time zone in 2009.
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

^ That is, the DST clock change settings for the affected time zones were set at 0.
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

.For example, Nome, Alaska, is at 165° 24′ W longitude, which is just west of center of the idealized Samoa Time Zone (165° W), but Nome observes Alaska Time (135° W) with DST, so it is slightly more than two hours ahead of the sun in winter and three in summer.^ During the summer, Russia's clocks are two hours ahead of standard time.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

^ During the winter, all 11 of the Russian time zones are an hour ahead of standard time.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

^ The time zones are shifts from UTC, and DST is just a 1 hour change of time zone.
  • Daylight-saving change could confuse gadgets - CNET News 19 January 2010 9:54 UTC news.cnet.com [Source type: FILTERED WITH BAYES]

[36] .Double daylight saving time has been used on occasion; for example, Britain used it during World War II.^ Daylight savings time clipart and illustrations .
  • Daylight savings time Clipart EPS Images. 4 Daylight savings time clip art vector illustrations available to search from over 15 royalty free illustration publishers. 12 September 2009 11:57 UTC www.fotosearch.com [Source type: General]

^ Daylight Saving Time prevents crime.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ Daylight saving time.
  • Daylight Saving Time changes 19 January 2010 9:54 UTC forum.brighthand.com [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time Update 19 January 2010 9:54 UTC forum.brighthand.com [Source type: FILTERED WITH BAYES]

[27]
.DST is generally not observed near the equator, where sunrise times do not vary enough to justify it.^ Summer Time is not needed near the Equator.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ For example, the state of Arizona does not observe DST. From a DST point of view, Arizona is logically located in Mountain Standard Time for part of the year, and Pacific Daylight Time for the remainder of the year.
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

^ As reported in various publications, including Daily Times , Pakistan has announced the start of DST for 2009 on April 15 th at midnight.
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

.Some countries observe it only in some regions; for example, southern Brazil observes it while equatorial Brazil does not.^ For example, the state of Arizona does not observe DST. From a DST point of view, Arizona is logically located in Mountain Standard Time for part of the year, and Pacific Daylight Time for the remainder of the year.
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

^ Wikimedia Commons In fact, although 76 countries observe some form of summer time, it's mostly a high-latitude phenomenon.
  • SkyandTelescope.com - News Blog - Daylight-Saving Time? Bah, Humbug! 19 January 2010 9:54 UTC www.skyandtelescope.com [Source type: General]

^ Not only is the state split between two time zones, but until recently, only some parts of the state observed daylight saving time while the majority did not.

[37] .Only a minority of the world's population uses DST because Asia and Africa generally do not observe it.^ Odd about no savings in the US because I just heard that Alberta had a 3% reduction in the use of electricity due to the earlier DST. This is only one study so it may change.
  • Early Daylight Saving Time a bust - Review-Journal eForum 19 January 2010 9:54 UTC eforum.reviewjournal.com [Source type: FILTERED WITH BAYES]

^ (PDF file) looked at the electricity use when portions of the state finally started to observe DST. Before the new extended DST, portions of Indiana did not observe DST. .
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]

^ With this premise in mind, GroupWise engineers designed GroupWise to account for and synchronize messages not only by using the finite standards of the defined world time zones, but also by using the more unevenly applied standard known as Daylight Saving Time (DST).
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

Benefits and drawbacks

A standing man in three-piece suit, facing camera. He is about 60 and is bald with a mustache. <a name=.His left hand is in his pants pocket, and his right hand is in front of his chest, holding his pocket watch."^ Press and hold recessed button (On left side of watch) for about 4-6 seconds there will now be a Time Zone either a letter abbreviation or a numerical abbreviation (On the left side of display) with the current hour to the right of it flashing.

src="http://images-mediawiki-sites.thefullwiki.org/02/3/3/1/97748621290706730.jpg" width="120" height="248" class="thumbimage" />
.
William Willett independently proposed DST in 1907 and advocated it tirelessly.
^ A monument was erected in 1927 to William Willett, first advocate of summer time, as it is called in England, in an open space in a wood near Chiselhurst, Kent.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ But it wasn't for more than a century later that an Englishman, William Willett, suggested it again in 1907.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]

^ "William Willett, the British architect and golfer who came up with the idea in 1907..."
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

[38]
.Willett's 1907 proposal argued that DST increases opportunities for outdoor leisure activities during afternoon sunlight hours.^ When the extension of daylight-saving time was proposed by Mr. Markey, he cited studies that noted "less crime, fewer traffic fatalities, more recreation time and increased economic activity" with the extra sunlight in the evening.
  • Daylight Saving Wastes Energy, Study Says - WSJ.com 19 January 2010 9:54 UTC online.wsj.com [Source type: News]

^ Adding daylight to afternoons benefits retailing, sports, and other activities that exploit sunlight after working hours, but causes problems for farming, evening entertainment and other occupations tied to the sun.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Unless all users re-book all affected appointments, some calendar items will be one hour off during the extended DST period.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

.The longer days nearer the summer solstice in high latitudes offer more room to shift daylight from morning to evening so that early morning daylight is not wasted.^ Prerau says darker mornings do produce more car accidents involving kids, but that increase is more than made up for by the much larger decline in early evening accidents.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ Mondays following the switch to daylight saving time compared to other days, and 2,649 more days of work were lost as a result of those injuries ...
  • SurfWax: News, Reviews and Articles On Daylight Saving Time 19 November 2009 18:38 UTC news.surfwax.com [Source type: News]

^ Daylight saving time (DST) is the convention of advancing clocks so that afternoons have more daylight and mornings have less.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

[24] .DST is commonly not observed during most of winter, because its mornings are darker: workers may have no sunlit leisure time, and children may need to leave for school in the dark.^ When DST is not observed, it is called standard time, normal or winter time.
  • Daylight Saving Time (DST) / Summer Time of World Countries 19 January 2010 9:54 UTC timezoneguide.com [Source type: FILTERED WITH BAYES]

^ Most commonly, this occurs because: .
  • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

^ When DST is not observed, it is called standard time, normal time or winter time.
  • Daylight Saving Time Around the World 2009 19 January 2010 9:54 UTC www.timeanddate.com [Source type: Original source]

[39]
.General agreement about the day's layout confers so many advantages that a standard DST schedule usually outranks ad hoc efforts to get up earlier, even for people who personally dislike the DST schedule.^ After you create your free account you will be able to customize many options, you will have the full access to over 15,000 posts/day about local topics and you will see fewer ads.
  • No daylight savings time?? - Arizona (AZ) - Page 2 - City-Data Forum 12 September 2009 11:57 UTC www.city-data.com [Source type: General]
  • Arizona Daylight Savings ? (Phoenix: live, move, trains) - (AZ) - City-Data Forum 12 September 2009 11:57 UTC www.city-data.com [Source type: General]

^ The change is wreaking havoc on computer techs the world over, who are just now getting around to updating software with patches to adjust the DST date (even though we've known about this for 2 years).
  • Daylight "Saving" Time...What Does It Save, Anyway? | Wise Bread 19 January 2010 9:54 UTC www.wisebread.com [Source type: General]

^ I think we can agree that short of "spring ahead" the sunrise to closer to 6 am, people would naturally start their day earlier and working schedules would have to be changed, just as work schedules are effectively moved earlier in the day thanks to Daylight Saving.
  • Rejoice! Daylight saving time is ending | Booster Shots | Los Angeles Times 19 January 2010 9:54 UTC latimesblogs.latimes.com [Source type: General]

[40] .The advantages of coordination are so great that many people ignore whether DST is in effect by altering their nominal work schedules to coordinate with television broadcasts or daylight.^ The advantages of Daylight Saving are manifold and great.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ I think we can agree that short of "spring ahead" the sunrise to closer to 6 am, people would naturally start their day earlier and working schedules would have to be changed, just as work schedules are effectively moved earlier in the day thanks to Daylight Saving.
  • Rejoice! Daylight saving time is ending | Booster Shots | Los Angeles Times 19 January 2010 9:54 UTC latimesblogs.latimes.com [Source type: General]

^ It sounds to me like the people who made this decision have no idea of how many consumer devices they are making useless without extra work.
  • Daylight-saving change could confuse gadgets - CNET News 19 January 2010 9:54 UTC news.cnet.com [Source type: FILTERED WITH BAYES]

[41]

Energy use

.DST's potential to save energy comes primarily from its effects on residential lighting, which consumes about 3.5% of electricity in the U.S. and Canada.^ It's not about saving energy.
  • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

^ Although an early goal of DST was to reduce evening usage of incandescent lighting, formerly a primary use of electricity, modern heating and cooling usage patterns differ greatly, and research about how DST currently affects energy use is limited and often contradictory.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ The California Energy Commission's Demand Analysis Office published a report titled The Effect of Early Daylight Saving Time on California Electricity Consumption: A Statistical Analysis , Commission publication # CEC-200-2007-004, in May 2007.
  • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]

[8] .Delaying the nominal time of sunset and sunrise reduces the use of artificial light in the evening and increases it in the morning.^ Have work hours during the day, and show reduced energy usage by using natural light.
  • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

^ "Under artificial illumination production falls, even if electric light of sufficient intensity is provided.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ The efficiency of the worker is materially increased through the substitution of natural light for artificial light.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

.As Franklin's 1784 satire pointed out, lighting costs are reduced if the evening reduction outweighs the morning increase, as in high-latitude summer when most people wake up well after sunrise.^ Putting Local Time ahead of Solar Time during the Summer is commonly said to have first been suggested (apparently frivolously) in an essay by Benjamin Franklin (Paris, 1784).
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ However, in the decades since then, air conditioning has become much more ubiquitous, and its power consumption greatly outpaces the reduction in lighting — although this is slightly offset by reduced heating on fall and spring mornings.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

^ It was a letter written in 1784 for the Journal de Paris in which he proposed firing cannons at sunrise to wake people up and break them from their nocturnal habits.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

.An early goal of DST was to reduce evening usage of incandescent lighting, formerly a primary use of electricity.^ Although an early goal of DST was to reduce evening usage of incandescent lighting, formerly a primary use of electricity, modern heating and cooling usage patterns differ greatly, and research about how DST currently affects energy use is limited and often contradictory.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Have work hours during the day, and show reduced energy usage by using natural light.
  • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

^ "Under artificial illumination production falls, even if electric light of sufficient intensity is provided.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

[7] .Although energy conservation remains an important goal,[34] energy usage patterns have greatly changed since then, and recent research is limited and reports contradictory results.^ Although an early goal of DST was to reduce evening usage of incandescent lighting, formerly a primary use of electricity, modern heating and cooling usage patterns differ greatly, and research about how DST currently affects energy use is limited and often contradictory.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Ever since, changes in time laws have been driven primarily by war and energy crises.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ Before this year's bill, that pattern had not changed since 1987.
  • Daylight-saving change could confuse gadgets - CNET News 19 January 2010 9:54 UTC news.cnet.com [Source type: FILTERED WITH BAYES]

.Electricity use is greatly affected by geography, climate, and economics, making it hard to generalize from single studies.^ "Places like Florida, with maximum air conditioning needs, clearly use more electricity because of daylight saving;" This doesn't seem to make sense.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

^ The tool currently assumes that any single-instance appointments in the affected time period were generated using the old time zone rules and offers to update them.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ If you use fossil fuel to make the electricity to make the hydrogen fuel, you haven't gained anything.
  • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

[8]
  • The U.S. Dept. of .Transportation (DOT) concluded in 1975 that DST might reduce the country's electricity usage by 1% during March and April,[8] but the National Bureau of Standards (NBS) reviewed the DOT study in 1976 and found no significant savings.^ In fact, the year after the Department of Transportation found a 1% savings, the National Bureau of Standards reviewed their data and found no savings.
    • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

    ^ Another study quoted on the page does: "Based on consumption figures for 1974 and 1975, The Department of Transportation says observing Daylight Saving Time in March and April saved the equivalent in energy of 10,000 barrels of oil each day."
    • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

    ^ World Countries observe Daylight saving time during summer, and is usually one hour ahead of standard time.
    • Daylight Saving Time (DST) / Summer Time of World Countries 19 January 2010 9:54 UTC timezoneguide.com [Source type: FILTERED WITH BAYES]

    [39]
  • .
  • In 2000 when parts of Australia began DST in late winter, overall electricity consumption did not decrease, but the morning peak load and prices increased.^ There was an experiment - British Standard Time - between '68 and '71 that suggested that the increase in accidents in the morning was considerably more than outweighed by the decrease in accidents in the evening.
    • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

    ^ He did this immediately following the 9AM news on Saturday morning 23rd November, and it was at the Queens Park Tennis Club in Southport, Queensland Australia.
    • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

    ^ With oil prices at $58 a barrell, that's a dismal $81.2 million in energy savings and a decrease of less than 1/2 of a percent of the U.S.'s total oil consumption.
    • Daylight-saving change could confuse gadgets - CNET News 19 January 2010 9:54 UTC news.cnet.com [Source type: FILTERED WITH BAYES]

    [42]
  • .
  • In Western Australia during summer 2006–07, DST increased electricity consumption during hotter days and decreased it during cooler days, with consumption rising 0.6% overall.^ CSCtc11035— DST change for Western Australia .
    • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

    ^ Once again, as has happened in the past, a couple of countries will see new changes to their observation of Daylight Saving Time (DST) , this time in Egypt and Western Australia.
    • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

    ^ Since Western Australia has also decided to adopt a 3-year “Summer Time” trial, all previously released patches for DST are not valid.
    • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

    [43]
  • .
  • Although a 2007 study estimated that introducing DST to Japan would reduce household lighting energy consumption,[44] a 2007 simulation estimated that DST would increase overall energy use in Osaka residences by 0.13%, with a 0.02% decrease due to less lighting more than outweighed by a 0.15% increase due to extra cooling; neither study examined non-residential energy use.^ DST actually causes more, not less, energy use.
    • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

    ^ I don't have an airconditioner so don't use more energy.
    • Western Australia: Daylight saving - your opinion? 12 September 2009 11:57 UTC blogs.abc.net.au [Source type: General]

    ^ However, in the decades since then, air conditioning has become much more ubiquitous, and its power consumption greatly outpaces the reduction in lighting — although this is slightly offset by reduced heating on fall and spring mornings.
    • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

    [45] .DST's effect on lighting energy use is noticeable mainly in residences.^ Have work hours during the day, and show reduced energy usage by using natural light.
    • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

    ^ You may notice that appointments sent to the Newfoundland time zone (NFT) from another time zone are scheduled 4 hours, 16 minutes late when DST is not in effect or 3 hours late when DST is in effect.
    • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

    ^ DST actually causes more, not less, energy use.
    • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

    [8]
  • .
  • A 2007 study found that the earlier start to DST that year had little or no effect on electricity consumption in California.^ Beginning this year, DST start three weeks earlier (2:00 a.m.
    • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

    ^ When this law goes into effect in March 2007, DST will start three weeks earlier (2:00 A.M. on the second Sunday in March) and will end one week later (2:00 A.M. on the first Sunday in November) than what had traditionally occurred.
    • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

    ^ Odd about no savings in the US because I just heard that Alberta had a 3% reduction in the use of electricity due to the earlier DST. This is only one study so it may change.
    • Early Daylight Saving Time a bust - Review-Journal eForum 19 January 2010 9:54 UTC eforum.reviewjournal.com [Source type: FILTERED WITH BAYES]

    [46]
  • .
  • A 2007 study estimated that winter daylight saving would prevent a 2% increase in average daily electricity consumption in Great Britain.^ Daylight Saving Time prevents crime.
    • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

    ^ Daylight Saving Time changes in 2007 .
    • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

    ^ The advantages of Daylight Saving are manifold and great.
    • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

    [47]
  • .
  • A 2008 study examined billing data in Indiana before and after it adopted DST in 2006, and concluded that DST increased overall residential electricity consumption by 1%, due mostly to extra afternoon cooling and due also to extra morning heating; the main increases came in the fall.^ Output is also increased by the substitution of a cool morning hour for a hot afternoon hour.
    • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

    ^ However, in the decades since then, air conditioning has become much more ubiquitous, and its power consumption greatly outpaces the reduction in lighting — although this is slightly offset by reduced heating on fall and spring mornings.
    • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

    ^ Odd about no savings in the US because I just heard that Alberta had a 3% reduction in the use of electricity due to the earlier DST. This is only one study so it may change.
    • Early Daylight Saving Time a bust - Review-Journal eForum 19 January 2010 9:54 UTC eforum.reviewjournal.com [Source type: FILTERED WITH BAYES]

    .The overall annual cost of DST to Indiana households was estimated to be $9 million, with an additional $1.7–5.5 million for social costs due to increased pollution.^ Daylight Savings Time Daylight Savings Time Does Not Save Energy Researchers found that Daylight Savings Time, touted as an energy saving measure, actually increases energy consumption due to a common household appliance.
    • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

    ^ One paper from UC Santa Barbara calculated the cost of the resulting pollution as several million dollars per year.
    • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

    [48]
  • The U.S. Dept. of .Energy (DOE) concluded in a 2008 report that the 2007 U.S. extension of DST saved 0.5% of electricity usage during the extended period.^ DST does NOT save energy.
    • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

    ^ How DST saves energy is beyond me.
    • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

    ^ This occurs during the extended-DST periods or previous extended-DST periods in the following items.
    • Preparing for daylight saving time changes in 2008 12 September 2009 11:57 UTC support.microsoft.com [Source type: FILTERED WITH BAYES]

    [49] .This report analyzed only the extension, not the full eight months of daylight saving, and did not examine the use of heating fuels.^ The original 4.1 system that was migrated to 5.x did not use Daylight Saving Time.
    • GroupWise and Daylight Saving Time 19 January 2010 9:54 UTC support.novell.com [Source type: FILTERED WITH BAYES]

    ^ In 1918, in order to conserve resources for the war effort, the U.S. Congress placed the country on Daylight Saving Time for the remainder of WW I. It was observed for seven months in 1918 and 1919.
    • Daylight Saving Time - Saving Time, Saving Energy 12 September 2009 11:57 UTC www.energy.ca.gov [Source type: FILTERED WITH BAYES]

    ^ On September 8, 2005, a bill was signed into law that will extend Daylight Saving Time by nearly a month.

    [50]
Several studies have suggested that DST increases motor fuel consumption.[8] The 2008 DOE report found no significant increase in motor gasoline consumption due to the 2007 U.S. extension of DST.[49]

Economic effects

.Retailers, sporting goods makers, and other businesses benefit from extra afternoon sunlight, as it induces customers to shop and to participate in outdoor afternoon sports.^ Adding daylight to afternoons benefits retailing, sports, and other activities that exploit sunlight after working hours, but causes problems for farming, evening entertainment and other occupations tied to the sun.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Sporting events, training and many other activities are affected by DLS and to the detriment of those participating.
  • Daylight saving time in WA 19 January 2010 9:54 UTC gorey.com.au [Source type: General]

[51] .In 1984, Fortune magazine estimated that a seven-week extension of DST would yield an additional $30 million for 7-Eleven stores, and the National Golf Foundation estimated the extension would increase golf industry revenues $200 million to $300 million.^ In that Congressional hearing, [the] golf industry alone, these are industry estimates, told Congress one additional month of daylight saving was worth 200 million dollars in sales of golf clubs and greens fees.
  • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

^ The BBQ industry said it was worth 100 million dollars in additional sales of grills and charcoal briquettes.
  • Think daylight saving time saves energy? Think again. Or not. — Autoblog Green 19 January 2010 9:54 UTC green.autoblog.com [Source type: FILTERED WITH BAYES]

^ The golf industry is said to have benefited by an additional $200 million, just from that one additional month; and the barbecue industry is said to have sold an additional $100 million in barbecues and charcoal briquettes.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

[52] .A 1999 study estimated that DST increases the revenue of the European Union's leisure sector by about 3%.^ The Department of Transportation estimated that 50 lives were saved and about 2,000 injuries were prevented in March and April of the study years.
  • Daylight Saving Time - Saving Time, Saving Energy 19 January 2010 9:54 UTC pages.citebite.com [Source type: FILTERED WITH BAYES]

^ In this page, statements about the European Union Summer Time rules are largely derived from the English version (which uses GMT; others do not), and GMT often means GMT/UTC. .
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[8] .Conversely, DST can adversely affect farmers and others whose hours are set by the sun.^ Farmers would have an extra evening hour of light, and those in other occupations who wish to raise food plants would have the same extra hour after the close of their working day.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ At the same time, other farmers express the same pleasure as other people at an extra hour of sunlit family recreation time after a summer workday.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

^ Unless all users re-book all affected appointments, some calendar items will be one hour off during the extended DST period.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

[4] For example, grain harvesting is best done after dew evaporates, so when field hands arrive and leave earlier in summer their labor is less valuable.[53] .DST also hurts prime-time broadcast ratings[5] and drive-in and other theaters.^ If we are going to choose one or the other - let's KEEP DST ALL THE TIME!!
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ This time zone update will also include changes for other related DST changes and time zone behavior and settings.
  • Preparing for daylight saving time changes in 2008 12 September 2009 11:57 UTC support.microsoft.com [Source type: FILTERED WITH BAYES]

^ This time zone update also includes changes for other related DST changes and time zone behavior and settings that have taken place since Exchange 2003 was originally released.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

[54]
.Changing clocks and DST rules has a direct economic cost, entailing extra work to support remote meetings, computer applications and the like.^ For the DST 2007 rule changes, Outlook Web Access needs the following updated binary files: .
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ On Windows Vista, this change occurred on January 1, 2007, which was when Windows Vista clients automatically transitioned to the DST 2007 rules.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ It sounds to me like the people who made this decision have no idea of how many consumer devices they are making useless without extra work.
  • Daylight-saving change could confuse gadgets - CNET News 19 January 2010 9:54 UTC news.cnet.com [Source type: FILTERED WITH BAYES]

.For example, a 2007 North American rule change cost an estimated $500 million to $1 billion.^ The date switch in 2007 cost an estimated $500 million to $1 billion.
  • SkyandTelescope.com - News Blog - Daylight-Saving Time? Bah, Humbug! 19 January 2010 9:54 UTC www.skyandtelescope.com [Source type: General]

^ For the DST 2007 rule changes, Outlook Web Access needs the following updated binary files: .
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ On Windows Vista, this change occurred on January 1, 2007, which was when Windows Vista clients automatically transitioned to the DST 2007 rules.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

[55] .Although it has been argued that clock shifts correlate with decreased economic efficiency, and that in 2000 the daylight-saving effect implied an estimated one-day loss of $31 billion on U.S. stock exchanges,[56] the estimated numbers depend on the methodology[57] and the results have been disputed.^ "When do we change the clocks for Daylight Savings Time?"

^ The exception to this is in the Navajo Nation Community of Arizona , which observes Daylight-Saving Time, where the time is shifted forward by 1 hour, resulting in a 6 hours difference behind GMT. The Hopi Nation, within the Navajo Reservation, does not operate time changes."

^ Fall Back...Daylight Savings Time Change This Weekend Gain one extra hour of sleep this weekend when you turn your clocks back for daylight-savings time By Paula Neal Mooney   |  Published 10/26/2006 More topics: Daylight Savings Time .
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

[58]

Public safety

.In 1975 the U.S. DOT conservatively identified a 0.7% reduction in traffic fatalities during DST, and estimated the real reduction to be 1.5% to 2%,[59] but the 1976 NBS review of the DOT study found no differences in traffic fatalities.^ Unless you're a VAMPIRE? DST shows no provable reduction in energy, cost money in man hours, overtime pay,etc.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ And I really question your "facts" Mr. Fisher, when it comes to the reduction of crime and traffic accidents.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ In fact, the year after the Department of Transportation found a 1% savings, the National Bureau of Standards reviewed their data and found no savings.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

[39] In 1995 the Insurance Institute for Highway Safety estimated a reduction of 1.2%, including a 5% reduction in crashes fatal to pedestrians.[6] Others have found similar reductions.[60] .Single/Double Summer Time (SDST), a variant where clocks are one hour ahead of the sun in winter and two in summer, has been projected to reduce traffic fatalities by 3% to 4% in the UK, compared to ordinary DST.[61] It is not clear whether sleep disruption contributes to fatal accidents immediately after the spring clock shifts.^ Move the clocks ahead another hour...
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ The length of Winter Time will vary.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ A study shows an increase in traffic accidents immediately following the spring daylight savings time shift.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

[62] .A correlation between clock shifts and traffic accidents has been observed in North America and the UK but not in Finland or Sweden.^ A study shows an increase in traffic accidents immediately following the spring daylight savings time shift.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

.If this effect exists, it is far smaller than the overall reduction in traffic fatalities.^ Traffic fatalities are reduced when there is extra afternoon daylight; its effect on health and crime is less clear.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

[63] .A 2009 U.S. study found that on Mondays after the switch to DST, workers sleep an average of 40 minutes less, and are injured at work more often and more severely.^ Daylight saving time (DST) is the convention of advancing clocks so that afternoons have more daylight and mornings have less.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ DST actually causes more, not less, energy use.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ DST causes more daylight time to be spent at work, so that all year long, daylight is aligned with the working day.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

[64]
.In the 1970s the U.S. Law Enforcement Assistance Administration (LEAA) found a reduction of 10% to 13% in Washington, D.C.'s violent crime rate during DST. However, the LEAA did not filter out other factors, and it examined only two cities and found crime reductions only in one and only in some crime categories; the DOT decided it was "impossible to conclude with any confidence that comparable benefits would be found nationwide".[65] Outdoor lighting has a marginal and sometimes even contradictory influence on crime and fear of crime.^ Unless all users re-book all affected appointments, some calendar items will be one hour off during the extended DST period.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ Oh, and don’t even bother calling T-Mobile – they have no clue (though they finally did refer me to the DST link on the MS site.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ During Daylight Saving Time, which begins in the spring, clocks are turned forward an hour, shifting an hour of light from the morning to the evening.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

[66]
.In several countries, fire safety officials encourage citizens to use the two annual clock shifts as reminders to replace batteries in smoke and carbon monoxide detectors, particularly in autumn, just before the heating and candle season causes an increase in home fires.^ It is also important to remember to change the batteries in your carbon monoxide detectors.
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

^ Fire departments encourage people to change the batteries in their smoke detectors when they change their clocks because Daylight Saving Time provides a convenient reminder.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Most people are aware of the need to change the batteries in their smoke detectors, when the time changes.
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

.Similar twice-yearly tasks include reviewing and practicing fire escape and family disaster plans, inspecting vehicle lights, checking storage areas for hazardous materials, reprogramming thermostats, and seasonal vaccinations.^ Every family benefits from the material reduction in cost of lighting through the practice of Daylight Saving.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

[67] .Locations without DST can instead use the first days of spring and autumn as reminders.^ Occasionally, a UK clock change has been on a day other than Sunday - Autumn 1917-1921 (from BST), Spring 1945 (to BDST).
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ From 1916, Britain has always had advanced time in Summer, and has always used GMT+1 in late Spring and early Autumn.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ From 2007, DST is from the second Sunday of March until the first Sunday in November; the clock changes remain on reaching 2 am local time - Spring: 02:00 to 03:00 and Autumn: 02:00 to 01:00.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[68]

Health

Graph of sunrise and sunset times for 2007. The horizontal axis is the date; the vertical axis is the times of sunset and sunrise. <a name=.There is a bulge in the center during summer, when sunrise is early and sunset late.^ Under those circumstances, you have late sunrises and late sunsets.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ Without adjusting our clocks, summer sunrise here is at 04:36, and sunset at 20:36.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ When daylight saving drops the working man's start time down closer to sunrise during the summer, this problem is prolonged for more of the year.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

.There are step functions in spring and fall, when DST starts and stops."^ Version 7.0 and 7.1 (through to 7.1(2)) of the Outbound Option also contain logic that makes hardcoded assumptions around pre-2007 DST start and stop dates.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

src="http://images-mediawiki-sites.thefullwiki.org/05/1/6/8/83344134207746914.png" width="370" height="291" class="thumbimage" />
Clock shifts affecting apparent sunrise and sunset times at Greenwich in 2007.[69]
DST has mixed effects on health. .In societies with fixed work schedules it provides more afternoon sunlight for outdoor exercise.^ People left work knowing they had hours of sunlight to enjoy, so they exercised or just relaxed after work, ate late and still had time to relax after dinner.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ The fix provided here does work on WM5, at least for the US. I tested it on my WM5 BlackJack Smartphone.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ The result was that the Romans accomplished a great deal of work in a long morning, leaving the afternoon for recreation, exercise, and care of the health.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

[70] It alters sunlight exposure; whether this is beneficial depends on one's location and daily schedule, as sunlight triggers vitamin D synthesis in the skin, but overexposure can lead to skin cancer.[71] .Sunlight strongly influences seasonal affective disorder.^ I have SAD, Seasonal Affective Disorder, just like those in Washington, Oregon and Alaska.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

.DST may help in depression by causing individuals to rise earlier,[72] but some argue the reverse.^ Daylight Saving Time (DST) changeover to help our customers who may be affected by these time changes.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

[73] The Retinitis Pigmentosa Foundation Fighting Blindness, chaired by blind sports magnate Gordon Gund, successfully lobbied in 1985 and 2005 for U.S. DST extensions,[3][74] but DST can hurt night blindness sufferers.[75]
.Clock shifts disrupt sleep and reduce its efficiency.^ Twice-a-year clock shifts cause confusion, disrupt your sleep, and, according to Swedish researchers, might even increase your risk of a heart attack.
  • SkyandTelescope.com - News Blog - Daylight-Saving Time? Bah, Humbug! 19 January 2010 9:54 UTC www.skyandtelescope.com [Source type: General]

[10] Effects on seasonal adaptation of the circadian rhythm can be severe and last for weeks.[76] A 2008 study found that although male suicide rates rise in the weeks after the spring transition, the relationship weakened greatly after adjusting for season.[77] .A 2008 Swedish study found that heart attacks were significantly more common the first three weekdays after the spring transition, and significantly less common the first weekday after the autumn transition.^ Savings Daylight Savings Time Change Brings Less Heart Attacks, Opportunity to Dream With a new study showing the end of daylight savings time is associated with reduced heart attack risk, enjoy that extra hour of guilt-free sleep.
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

^ "They discovered a 5% increase in heart attacks in the first three workdays after clocks were set ahead for the beginning of daylight saving time in the spring and a similar decrease on the Monday after clocks were set back for the end of daylight saving time in the fall."
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

^ And according to one study, there is a spike in heart attacks during the first week of Daylight Saving Time.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

[78] The government of Kazakhstan cited health complications due to clock shifts as a reason for abolishing DST in 2005.[79]

Complexity

.DST's clock shifts have the obvious disadvantage of complexity.^ The first is merely twice as dumb; the latter is totally idiotic, since the whole point of DST is to shift the clock in accordance with the seasons.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

.People must remember to change their clocks; this consumes time, particularly for mechanical clocks that cannot be moved backward safely.^ The clock changes were on reaching 2 am local time.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ "When do we change the clocks for Daylight Savings Time?"

^ On March 11, 2007, clocks will move forward from 01:59 A.M. to 03:00 A.M. On November 4, 2007, clocks will move backward from 01:59 A.M. to 01:00 A.M. While the change in DST applies to the U.S. and Canada, the change also affects people and organizations outside of North America.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

[80] .As more devices contain clocks, more time is spent changing them.^ "When do we change the clocks for Daylight Savings Time?"

^ The clock changes were on reaching 2 am local time.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Refer to CSCsk44933— Need to rebuild TZ database in CTS to support DST time change for more information about this product.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

[81] .People who work across time zone boundaries need to keep track of multiple DST rules, as not all locations observe DST or observe it the same way.^ The same rule may cover areas in different Time Zones .
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ The World Clock – Current time all over the world Personal World Clock Meeting Planner Time Zone Converter Fixed Time Calculator – If it's 3 pm in New York, what time is it in the rest of the world?
  • Daylight Saving Time Around the World 2009 19 January 2010 9:54 UTC www.timeanddate.com [Source type: Original source]

^ Time zones and time-sleep relationships are not all man induced.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

The length of the day becomes variable. Disruption to meetings, travel, broadcasts, billing systems, and records management is common, and can be expensive.[82] .During an autumn transition from 02:00 to 01:00, a clock reads times from 01:00:00 through 01:59:59 twice, possibly leading to confusion.^ Since then, all changes have been between 01:00 and 02:00 clock time.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ On March 11, 2007, clocks will move forward from 01:59 A.M. to 03:00 A.M. On November 4, 2007, clocks will move backward from 01:59 A.M. to 01:00 A.M. While the change in DST applies to the U.S. and Canada, the change also affects people and organizations outside of North America.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ Configure campaign start time and end time one hour earlier than the actual time from the last Sunday in March 2008 at 03:00 through the first Sunday in April 2008 and from the first Sunday in October 2008 at 02:00 through the last Sunday in October 2008 at 02:00.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

[83]
A standing stone in a grassy field surrounded by trees. <a name=.The stone contains a vertical sundial centered on 1 o'clock, and is inscribed "HORAS NON NUMERO NISI ÆSTIVAS" and "SUMMER TIME ACT 1925"."^ Great Britain recently extended the period during which the Summer-Time Act is in effect.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ If there is no Summer Time Order in place for a given year, then the Summer Time Act 1972 applies the following rules :- .
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ The arrangements for British Summer Time, BST, are established by Parliament through the Summer Time Act 1972.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

src="http://images-mediawiki-sites.thefullwiki.org/08/3/3/5/10582441430321092.jpg" width="170" height="255" class="thumbimage" />
The William Willett Memorial Sundial is always on DST.
.Some computer-based systems require downtime or restarting when clocks shift; ignoring this requirement damaged a German steel facility in 1993.[9] Medical devices may generate adverse events that could harm patients, without being obvious to clinicians responsible for care.^ The obvious response to this is that these tasks are going to continue to be done at sunrise, regardless of the time shown on some irrelevant clock.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

^ The script contains some logging, as it writes an event to the Application log of the client computer where the script was run to report the status of the installation - Event ID 1 is reported when there was some form of failure, or Event ID 4 is reported on success.
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

^ The Equinoxes could be approximated as the Third Sundays of March and September; or, allowing for the Autumn Equinox generally being warmer than the Spring one, the change could be at some fixed number of weeks after that or some specified Sunday of April and October.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[84] .These problems are compounded when the DST rules themselves change; software developers must test and perhaps modify many programs, and users must install updates and restart applications.^ For the DST 2007 rule changes, Outlook Web Access needs the following updated binary files: .
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ Microsoft Exchange Server 2007 Microsoft Office Outlook 2007 Microsoft Windows Vista Of these product lines, the products listed in Table 1 are affected by the DST 2007 rules change and require updating.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ On Windows Vista, this change occurred on January 1, 2007, which was when Windows Vista clients automatically transitioned to the DST 2007 rules.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

.Consumers must update devices such as programmable thermostats with the correct DST rules, or manually adjust the devices' clocks.^ For the DST 2007 rule changes, Outlook Web Access needs the following updated binary files: .
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ Microsoft strongly recommends that DST and time zone updates be installed on all impacted systems, devices and applications to ensure consistency with current DST rules and time zone settings worldwide.
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

^ Many computer-based systems can adjust their clocks automatically, but this can be limited and error-prone, particularly when DST rules change.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

[11]
.Some clock-shift problems could be avoided by adjusting clocks continuously[85] or at least more gradually—for example, Willett at first suggested weekly 20-minute transitions—but this would add complexity and has never been implemented.^ But the whole country shifting clocks just to pretend that we somehow have more usable daylight...that's just dumb.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ So if business open at one o clock in time zone one, then in time zone eight they could choose to start at 9 o clock and everyone would know exactly when it starts without having to recalculate.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ The first is merely twice as dumb; the latter is totally idiotic, since the whole point of DST is to shift the clock in accordance with the seasons.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

.DST inherits and can magnify the disadvantages of standard time.^ I personally would prefer year-round DST--aka Atlantic Standard Time--but since this is politically infeasible staying on EST all year would be better, except that it too is politically infeasible.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ These time zones have a bias of UTC +4 which is the same as Mauritius standard time bias and does not observe DST. .
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

^ This time zone has a bias of UTC +1 which is Tunisia’s standard time bias and does not observe DST. .
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

.For example, when reading a sundial, one must compensate for it along with time zone and natural discrepancies.^ You must cold start CWM once the time zone is changed on the server.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ Note: For more information on time zone configurations and how to reset the time, refer to the relevant procedure guide for the Cisco ONS release that you use.
  • U.S. Daylight Saving Time (DST) Changes for 2007 to Present - Cisco Systems 19 January 2010 9:54 UTC www.cisco.com [Source type: General]
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ Daylight Saving, in a nutshell, is to put the hands of the clock forward one hour simultaneously throughout the country in the different time zones, this to be accomplished by act of Congress.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

[86] .Also, sun-exposure rules like avoiding the sun within two hours of noon become less accurate when DST is in effect.^ And for anyone who says I like the extra hour of sun, that is too dumb for words.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ Those who installed the original DST patch discovered their appointments were off by an hour between March 11th and April 1st, when DST would have began if the old rules were still in effect.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ TZinfo_Bangla.vbs The DST and time zone settings registry must be updated in two locations to become active.
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

[87]

Politics

.Daylight saving has caused controversy since it began.^ There will be no daylight saving time (DST) in Mauritius in 2009 despite positive reports from a recent DST trial, which began in October 2008 and ended in March 2009.
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

^ Daylight Saving in WA http://wa.gov.au —A three year trial of daylight saving began in Western Australia on 3 December 2006.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ Since Cisco ANA Version 3.x comes with the Java Development Kit (JDK) 1.4.2_13, the daylight saving time at your location might have changed since JDK 1.4.2_13 was released.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

[1] .Winston Churchill argued that it enlarges "the opportunities for the pursuit of health and happiness among the millions of people who live in this country".[88] Robertson Davies, however, detected "the bony, blue-fingered hand of Puritanism, eager to push people into bed earlier, and get them up earlier, to make them healthy, wealthy and wise in spite of themselves",[89] and wags have dubbed it "Daylight Slaving Time".[90] Historically, retailing, sports and tourism interests have favored daylight saving, while agricultural and evening entertainment interests have opposed it, and its initial adoption has been prompted by energy crisis and war.^ I live in Arizona but I would prefer that Arizona observe Daylight Savings Time.
  • No daylight savings time?? (Phoenix, Congress: school, living, moving to) - Arizona (AZ) - City-Data Forum 12 September 2009 11:57 UTC www.city-data.com [Source type: General]

^ Daylight Saving Time prevents crime.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ Daylight saving time.
  • Daylight Saving Time changes 19 January 2010 9:54 UTC forum.brighthand.com [Source type: FILTERED WITH BAYES]

[91]
The fate of Willett's 1907 proposal illustrates several political issues involved. .The proposal attracted many supporters, including Balfour, Churchill, Lloyd George, MacDonald, Edward VII (who used half-hour DST at Sandringham), the managing director of Harrods, and the manager of the National Bank.^ The Fabric Manager cannot be used to configure multiple switches with this setting as it does not support DST configuration.
  • U.S. Daylight Saving Time (DST) Changes for 2007 to Present - Cisco Systems 19 January 2010 9:54 UTC www.cisco.com [Source type: General]
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ Federal law makes the use of DST a local option, but the rules are otherwise nation-wide.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ From everything I've read over the years, there are sooooo many benefits to DST, I'm amazed we haven't reverted to using it full time.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

However, the opposition was stronger: it included Prime Minister Asquith, Christie (the Astronomer Royal), George Darwin, Napier Shaw (director of the Meteorological Office), many agricultural organizations, and theater owners. .After many hearings the proposal was narrowly defeated in a Parliament committee vote in 1909. Willett's allies introduced similar bills every year from 1911 through 1914, to no avail.^ Lord Tanlaw introduced a bill that (unfortunately IMHO) would have had a three year trial of moving to GMT+1.
  • Daylight Saving Time Myths 19 January 2010 9:54 UTC skeptoid.com [Source type: General]

^ My home state in Australia also had this continual debate every year so when a state election came up, we had to also vote on this issue.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

[92] .The U.S. was even more skeptical: Andrew Peters introduced a DST bill to the U.S. House of Representatives in May 1909, but it soon died in committee.^ Champ Clark in signing the Bill for the House of Representatives.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ We were even more discouraged because our managers didn't care that 99% of our systems use UCT and DST didn't matter anyway.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ The House bill had been passed, but the Sub-Committee of the Interstate Commerce Committee (United States Senator Joseph Robinson, of Arkansas, Chairman), which had the subject in charge, was opposed to the legislation.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

[93]
Poster titled "VICTORY! CONGRESS PASSES DAYLIGHT SAVING BILL" showing Uncle Sam turning a clock to daylight saving time as a clock-headed figure throws his hat in the air. <a name=.The clock face of the figure reads "ONE HOUR OF EXTRA DAYLIGHT".^ The clock didnot advance one hour.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ World Countries observe Daylight saving time during summer, and is usually one hour ahead of standard time.
  • Daylight Saving Time (DST) / Summer Time of World Countries 19 January 2010 9:54 UTC timezoneguide.com [Source type: FILTERED WITH BAYES]

^ If someone wants an extra hour or two of daylight or darkness, let him adjust his personal schedule accordingly.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

The bottom caption says "Get Your Hoe Ready!"" src="http://images-mediawiki-sites.thefullwiki.org/10/1/1/9/49758862665211865.jpeg" width="170" height="302" class="thumbimage" />
Retailers generally favor DST. United Cigar Stores hailed a 1918 DST bill.
.World War I changed the political equation, as DST was promoted as a way to alleviate hardships from wartime coal shortages and air raid blackouts.^ It will change the time zone and DST setting for Bangladesh, and should not be altered in any way.
  • Microsoft Daylight Saving Time & Time Zone Blog 19 January 2010 9:54 UTC blogs.technet.com [Source type: General]

.After Germany led the way, the United Kingdom first used DST on May 21, 1916.[94] U.S. retailing and manufacturing interests led by Pittsburgh industrialist Robert Garland soon began lobbying for DST, but were opposed by railroads.^ Who lobbied for extended DST? The retailers and candy manufacturers.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ Bottom Caption: Presented to Robert Garland for conspicuous service in obtaining the legislation when President of the Chamber of Commerce of Pittsburgh, and as chairman of the National Committee on Daylight Saving of the Chamber of Commerce of the United States.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ During the summer of 1916 the Chamber of Commerce of Pittsburgh, under the presidency of Robert Garland, by unanimous action, voted in favor of Daylight Saving, and was the first commercial body in the entire country to present the subject to the Chamber of Commerce of the United States for its consideration.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

The U.S.'s 1917 entry to the war overcame objections, and DST was established in 1918.[95]
The war's end swung the pendulum back. Farmers continued to dislike DST, and many countries repealed it after the war. .Britain was an exception: it retained DST nationwide but over the years adjusted transition dates for several reasons, including special rules during the 1920s and 1930s to avoid clock shifts on Easter mornings.^ Rules using the N'th (including the 0'th, but not the Last) Sundays of March and November make Summer Time of constant length - 34 weeks for the new US dates.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Several products from Microsoft, including several versions of Microsoft Exchange Server, are affected by the new DST 2007 rules.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ The TCI500 will not be able to inject the DST information for non-date/year encoded time code generators.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

[27] .The U.S. was more typical: Congress repealed DST after 1919. President Woodrow Wilson, like Willett an avid golfer, vetoed the repeal twice but his second veto was overridden.^ Left Pen: Pen used by President Woodrow Wilson in signing the Daylight Saving Bill.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ In the event that Congress resumes the prior DST rules, the upgrade procedure will have to be repeated, along with the associated cost.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ President Woodrow Wilson.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

[96] .Only a few U.S. cities retained DST locally thereafter,[97] including New York so that its financial exchanges could maintain an hour of arbitrage trading with London, and Chicago and Cleveland to keep pace with New York.^ Affected devices that are not changed could display the time exactly 1 hour off from the actual time during DST periods in spring and fall.
  • U.S. Daylight Saving Time (DST) Changes for 2007 to Present - Cisco Systems 19 January 2010 9:54 UTC www.cisco.com [Source type: General]

^ Several products from Microsoft, including several versions of Microsoft Exchange Server, are affected by the new DST 2007 rules.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ "Now gentlemen, there is typhus in New York City today.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

[98] .Wilson's successor Warren G. Harding opposed DST as a "deception". Reasoning that people should instead get up and go to work earlier in the summer, he ordered District of Columbia federal employees to start work at 08:00 rather than 09:00 during summer 1922. Many businesses followed suit though many others did not; the experiment was not repeated.^ Many men got up in the middle of the night to start the day's work.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ Beginning this year, DST start three weeks earlier (2:00 a.m.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ After one summer of confusion, Harding backed down and repealed his order.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

[99]
.Since Willett's day the world has seen many enactments, adjustments, and repeals of DST, with similar politics involved.^ I personally would prefer year-round DST--aka Atlantic Standard Time--but since this is politically infeasible staying on EST all year would be better, except that it too is politically infeasible.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

[100] .The history of time in the United States includes DST during both world wars, but no standardization of peacetime DST until 1966.[101][102] In the mid-1980s, Clorox (parent of Kingsford Charcoal) and 7-Eleven provided the primary funding for the Daylight Saving Time Coalition behind the 1987 extension to U.S. DST, and both Idaho senators voted for it based on the premise that during DST fast-food restaurants sell more French fries, which are made from Idaho potatoes;[3] in 2005, the Sporting Goods Manufacturers Association and the National Association of Convenience Stores successfully lobbied for the 2007 extension to U.S. DST.[74] After a three-year trial, more than 55% of Western Australians voted against DST in 2009, with rural areas strongly opposed.^ United States: Daylight Saving Time Begins March 14 at 2:00 a.m.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Daylight Saving Time prevents crime.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ Daylight saving time.
  • Daylight Saving Time changes 19 January 2010 9:54 UTC forum.brighthand.com [Source type: FILTERED WITH BAYES]
  • Daylight Saving Time Update 19 January 2010 9:54 UTC forum.brighthand.com [Source type: FILTERED WITH BAYES]

[103] .In the UK the sport and leisure industry supports a proposal to observe SDST's additional hour year-round.^ The most important thing, I believe, is that the whole world be together on this, so that there's a one hour difference in each time zone all year 'round.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ From 1968-10-27 to 1971-10-31, we had British Standard Time - an hour ahead of GMT, all year round.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Double Summer Time (with "Single Winter Time") is equivalent to a year-round eastward change of Time Zone ; the clocks are set two hours ahead of Standard Time in Summer, and one hour in Winter.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[104]

Terminology

.Although daylight saving time is considered to be correct, daylight savings time is commonly used.^ Daylight Saving Time prevents crime.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ Daylight saving time.
  • Daylight Saving Time changes 19 January 2010 9:54 UTC forum.brighthand.com [Source type: FILTERED WITH BAYES]

^ Daylight saving time change failed .
  • Daylight Saving Time changes 19 January 2010 9:54 UTC forum.brighthand.com [Source type: FILTERED WITH BAYES]

[105] .The form daylight saving time uses the present participle saving as an adjective, as in labor saving device; the first two words are sometimes hyphenated, as in daylight-saving time.^ Daylight Saving Time prevents crime.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ Daylight saving time.
  • Daylight Saving Time Update 19 January 2010 9:54 UTC forum.brighthand.com [Source type: FILTERED WITH BAYES]

^ Daylight Saving Time changes in 2007 .
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

.The common variants daylight savings time and daylight savings use savings by analogy to savings account.^ Daylight Saving Time prevents crime.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ Daylight Saving Time changes in 2007 .
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ Daylight saving time is also called summer time or daylight savings time.
  • Daylight Saving Time Around the World 2009 19 January 2010 9:54 UTC www.timeanddate.com [Source type: Original source]

.Daylight time is also common.^ Daylight Savings Time Daylight Savings Time Does Not Save Energy Researchers found that Daylight Savings Time, touted as an energy saving measure, actually increases energy consumption due to a common household appliance.
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

^ This section contains workarounds or manual configurations for the more common Cisco platforms that support daylight saving time.
  • U.S. Daylight Saving Time (DST) Changes for 2007 to Present - Cisco Systems 19 January 2010 9:54 UTC www.cisco.com [Source type: General]
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

[106] .Willett's 1907 proposal used the term daylight saving, but by 1911 the term summer time replaced daylight saving time in draft legislation in Britain,[38] and continental Europe uses similar phrases, such as Sommerzeit in Germany and l'heure d'été in France.^ Daylight Saving Time prevents crime.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ Links to other Summer Time / Daylight Saving (etc.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Daylight Saving Time changes in 2007 .
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

[94]
.The name of local time typically changes when DST is observed.^ The clock changes were on reaching 2 am local time.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ This change is typically referred to as DST 2007.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ Affected devices that are not changed could display the time exactly 1 hour off from the actual time during DST periods in spring and fall.
  • U.S. Daylight Saving Time (DST) Changes for 2007 to Present - Cisco Systems 19 January 2010 9:54 UTC www.cisco.com [Source type: General]

.American English replaces standard with daylight: for example, Pacific Standard Time (PST) becomes Pacific Daylight Time (PDT).^ I would be happier with either standard time or daylight time than I am with the hybrid scheme.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ Application of Daylight Saving to the Eastern Standard Time Zone will do away with the changing of railway schedules and time adjustments between the states, and permit the fullest enjoyment of its benefits.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

^ For example, the Eastern Standard Time (EST) in the United States is five hours behind the UTC time when daylight saving time is not active.
  • U.S. Daylight Saving Time (DST) Changes for 2007 to Present - Cisco Systems 19 January 2010 9:54 UTC www.cisco.com [Source type: General]

.British English typically inserts summer: for example, Central European Time (CET) becomes Central European Summer Time (CEST).^ Once had the good fortune to spend a summer in southwestern Spain, which is on European Daylight Time, but is west of Greenwich.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

^ Example: Configuring the switches to manually compensate for DST for a GPS200A located in the Central Time zone.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

.Abbreviations do not always change: for example, many (though not all) Australians say that Eastern Standard Time (EST) becomes Eastern Summer Time (also EST).^ Summer Time', from the Royal Observatory Greenwich, says that the change was at 2 a.m.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ I have always detested time-change.
  • I really hate daylight savings... (by Jeremy Zawodny) 12 September 2009 11:57 UTC jeremy.zawodny.com [Source type: General]

^ It is also used to refer to Universal Time (UT), which is a standard astronomical concept used in many technical fields and is referred to by the phrase Zulu time.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

.The American English mnemonic "spring forward, fall back" (also "spring ahead ...", "spring up ...", and "... fall behind") helps people remember which direction to shift clocks.^ When Daylight Saving Time ends in the fall, clocks are set back an hour and Standard Time resumes.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Daylight Savings Help Your Kids Cope with Daylight Savings, Spring and Fall Since most kids are on a schedule due to the school year, they tend to be the most affected by Daylight Savings.
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

^ Daylight Saving Time - Saving Time, Saving Energy Spring Forward...Fall Back!
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

Much of North America now advances clocks before the vernal equinox, so the mnemonic disagrees with the astronomical definition of spring, but a proposed substitute "March forward ..."[107] works only in the northern hemisphere, and is less robust against future rule changes.

Computing

Strong man in sandals and with shaggy hair, facing away from artist, grabbing a hand of a clock bigger than he is and forcing it backwards. The clock uses Roman numerals and the man is dressed in stripped-down Roman gladiator style. <a name=.The text says "You can't stop time...^ Daylight The History of Daylight Savings Time In America we all know the saying for Daylight Saving Time: "Fall Back, Spring Ahead," but do you know why we even have Daylight Savings Time?
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

.But you can turn it back one hour at 2 a.m.^ Fall Back...Daylight Savings Time Change This Weekend Gain one extra hour of sleep this weekend when you turn your clocks back for daylight-savings time By Paula Neal Mooney   |  Published 10/26/2006 More topics: Daylight Savings Time .
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

^ In order to work around this issue, you must set the time ahead one hour when the new daylight saving time occurs on the April 6, 2008.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ At 2:00am your time should move back one hour (I’m already looking forward to the extra hour of sleep), and once again you should receive the pop up indicator.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

on Oct. 28 when daylight-saving time ends and standard time begins."" src="http://images-mediawiki-sites.thefullwiki.org/04/3/0/6/36882161475288761.jpg" width="170" height="256" class="thumbimage" />
A 2001 U.S. public service advertisement reminded people to adjust clocks manually.
.Many computer-based systems can adjust automatically when DST starts and finishes, based on their time zone settings.^ Many computer-based systems can adjust their clocks automatically, but this can be limited and error-prone, particularly when DST rules change.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ For details about the Outlook Time Zone Data Update tool, see Knowledge Base article 931667, Addressing Daylight Saving Time using the Outlook Time Zone Data Update Tool .
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ Take an inventory of each Masterclock time code device in your system and the current configuration switch settings for each of the device(s).
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

.However, changes to DST rules causes problems in existing installations.^ Depending on the product's level of integration with Exchange Server and the underlying technologies and dependencies of the product, these products may also be affected by the DST 2007 rule change.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ In the case of the DST 2007 change (or any other modification to time zone rules), the tool is moving appointments from the old versions of the modified time zones to the new versions.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ Under the DST 2007 rules, in the U.S., clocks change at 02:00 A.M. local time.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

.For example, the 2007 change to DST rules in North America required many computer systems to be upgraded, with the greatest impact on email and calendaring programs like Microsoft Outlook; the upgrades consumed a significant effort by corporate information technologists.^ This change is typically referred to as DST 2007.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ Microsoft Products Affected by DST 2007 .
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ On March 11, 2007, clocks will move forward from 01:59 A.M. to 03:00 A.M. On November 4, 2007, clocks will move backward from 01:59 A.M. to 01:00 A.M. While the change in DST applies to the U.S. and Canada, the change also affects people and organizations outside of North America.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

[108] .Some applications standardize on UTC to avoid problems with clock shifts and time zone differences.^ When Daylight Saving Time ends in the fall, clocks are set back an hour and Standard Time resumes.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ The same rule may cover areas in different Time Zones .
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Uniform action throughout the five different time zones of the country as contemplated means the greatest good to the greatest number.
  • PDL: Ten Years of Daylight Saving 19 November 2009 18:38 UTC www.clpgh.org [Source type: Original source]

[109]
.Two computer-based implementations in wide use today are zoneinfo and Microsoft Windows.^ Wikipedia, "Daylight saving time", Microsoft Windows systems says that Vista introduces two sets of rules per location.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ To this point, Microsoft has not issued a new .inf file for Windows Mobile; to include the changes for Australia’s two western time zones.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

Tz database

The tz database maps a name to the named location's historical and predicted clock shifts. .This database is used by many computer software systems, including most Unix-like operating systems, Java, and Oracle;[110] HP's "tztab" database is similar but incompatible.^ JavaScript is required by ECMA-262 3rd Edn to use the current Summer Time rules for all years; some browsers on some operating systems, including UNIX types, do not comply .
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Many applications get their date and time information from the operating system.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

^ Many computer-based systems can adjust their clocks automatically, but this can be limited and error-prone, particularly when DST rules change.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

[111] .When temporal authorities change DST rules, zoneinfo updates are installed as part of ordinary system maintenance.^ Important Notice: The updates for the new DST may not be automaticly installed for your operating system, even if you have automatic updates enabled.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ Therefore, in order to resolve the DST issue, you must install the operating system patch that contains the fix for your operating system (Windows, Solaris, etc.
  • U.S. Daylight Saving Time (DST) Changes for 2007 to Present - Cisco Systems 19 January 2010 9:54 UTC www.cisco.com [Source type: General]

^ Option 3: Install a TCI500 time code interface to inject the new DST rules and time zone offset.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

.In Unix-like systems the TZ environment variable specifies the location name, as in TZ='America/New_York'.^ The Summer Time rules are often given by a DOS/UNIX Environment Variable TZ - see Time Zone .
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

.Older or stripped-down systems may support only the TZ values required by POSIX, which specify at most one start and end rule explicitly in the value.^ You're time is the most valuable thing you can give your loved ones.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ DOS-type file datestamps will not be affected; but some American Windows-only ones with values before 2007 held as 100ns units from Gregorian 1601-01-01.0 GMT may appear to change by an hour.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ For example, the 2007 US change has been described as "starting three weeks earlier" - but in about three years out of seven, it will be four weeks, not three (the end is always one week later).
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

.For example, TZ='EST5EDT,M3.2.0/02:00,M11.1.0/02:00' specifies time for eastern North America starting in 2007. TZ must be changed whenever DST rules change, and the new TZ value applies to all years, mishandling some older time stamps.^ The new 2007 DST schedule for time changeover has currently been adopted for most of North America.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ Daylight Saving Time changes in 2007 .
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ Before 1981, all changes were between 02:00 and 03:00 clock time.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[112]

Microsoft Windows

.As with zoneinfo, a user of Microsoft Windows configures DST by specifying the name of a location, and the operating system then consults a table of rule sets that must be updated when DST rules change.^ What is required is to update your Windows OS with the new DST rules.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ Windows OS update for DST is required .
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ On other Windows operating systems, this change will occur after the operating system updates have been applied.
  • Exchange Server and Daylight Saving Time (DST) 2007 19 January 2010 9:54 UTC technet.microsoft.com [Source type: FILTERED WITH BAYES]

Procedures for specifying the name and updating the table vary with release. .Updates are not issued for older versions of Microsoft Windows.^ Please refer to the Microsoft website for these Windows OS update issues.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ Maybe their plan is to issue an update that uses Windows Mobile 6, as I have read that they are planning a release on some devices early this year… .
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ Microsoft has released a patch for Windows and .NET that you can get through Windows Update.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

[113] .Windows Vista supports at most two start and end rules per time zone setting.^ Wikipedia, "Daylight saving time", Microsoft Windows systems says that Vista introduces two sets of rules per location.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Please consult the user manual of each device you will be configuring for the specific time zone offset and automatic DST enable switch settings.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ Refer to CSCsk85302— add support for new Venezuela/Australia/Argentina Time Zone change for information about this product.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

.In a Canadian location observing DST, a single Vista setting supports both 1987–2006 and post-2006 time stamps, but mishandles some older time stamps.^ Please consult the user manual of each device you will be configuring for the specific time zone offset and automatic DST enable switch settings.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ The information regarding the DST changeover schedule located in the current PROM device of your time code unit is hard-encoded.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ By default, the MDS SAN-OS does not adjust for daylight saving time, and the software provides no default values for DST settings.
  • U.S. Daylight Saving Time (DST) Changes for 2007 to Present - Cisco Systems 19 January 2010 9:54 UTC www.cisco.com [Source type: General]
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

.Older Microsoft Windows systems usually store only a single start and end rule for each zone, so that the same Canadian setting reliably supports only post-2006 time stamps.^ The same rule may cover areas in different Time Zones .
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Please consult the user manual of each device you will be configuring for the specific time zone offset and automatic DST enable switch settings.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ The new US rules should not have been loaded until a week after the end of DST 2006, unless the code is year-sensitive.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[114]
These limitations have caused problems. For example, before 2005, DST in Israel varied each year and was skipped some years. .Windows 95 used rules correct for 1995 only, causing problems in later years.^ It may be necessary to update both the rules currently in active use and those in the general database, if the chosen location may later be changed.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ The TCR cards use the Windows OS settings for date/time/DST rules, therefore the Windows OS DST settings must be correct in order for the card to set the time correctly (If DST is utilized).
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ It could be useful to know in which year each European country finally started using the current EU change date rules ( i.e.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

.In Windows 98 Microsoft gave up and marked Israel as not having DST, forcing Israeli users to shift their computer clocks manually twice a year.^ It is amazing how much of a problem Microsoft is having with the new DST rules.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ No more josteling the clocks back and forth twice a year.....
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

^ Many computer-based systems can adjust their clocks automatically, but this can be limited and error-prone, particularly when DST rules change.
  • Daylight Saving Time Begins March 14, 2010 19 January 2010 9:54 UTC www.squidoo.com [Source type: General]

.The 2005 Israeli Daylight Saving Law established predictable rules using the Jewish calendar but Windows zone files cannot represent the rules' dates in a year-independent way.^ Daylight Saving Time for other years .
  • Daylight Saving Time Around the World 2009 19 January 2010 9:54 UTC www.timeanddate.com [Source type: Original source]

^ By the way, the device I am using is Windows Mobile 5.0.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ Right to Revert- Congress retains the right to revert the Daylight Saving Time back to the 2005 time schedules once the Department study is complete.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

.Partial workarounds, which mishandle older time stamps, include manually switching zone files every year[115] and a Microsoft tool that switches zones automatically.^ Please consult the user manual of each device you will be configuring for the specific time zone offset and automatic DST enable switch settings.
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ Next, adjust or modify your time code source to output the local time (configure the time code generator for time zone and enable the automatic DST feature/option).
  • Masterclock.com | Daylight Saving Time Changes 2007 19 January 2010 9:54 UTC www.masterclock.com [Source type: General]

^ A Chicken has a head as big as a quarter and it awakens at the same time every day of the year!!
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

[116]
.Microsoft Windows keeps the system real-time clock in local time.^ CNR obtains the local time from the underlying operating system.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ This will not require the version maintenance described above, but will require the Windows operating system daylight saving time patch.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ Refer to Microsoft Knowledgebase article 942763—December 2007 cumulative time zone update for Microsoft Windows operating systems for more information.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

.This causes several problems, including compatibility when multi booting with operating systems that set the clock to UTC, and double-adjusting the clock when multi booting different Windows versions, such as with a rescue boot disk.^ Open the application for setting the system clock.
  • Daylight Saving Time – Windows Mobile Fix | edgeblog 19 January 2010 9:54 UTC www.edgeblog.net [Source type: General]

^ The Windows operating system patch should be applied regardless of whether the above workaround is taken.
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

^ Therefore, in order to resolve the DST issue, you must install the operating system patch that contains the fix for your operating system (Windows, Solaris, etc.
  • U.S. Daylight Saving Time (DST) Changes for 2007 to Present - Cisco Systems 19 January 2010 9:54 UTC www.cisco.com [Source type: General]
  • Australia Daylight Saving Time (DST) Changes for 2008 to Present  [IP Application Services] - Cisco Systems 19 January 2010 9:54 UTC cisco.com [Source type: Reference]

.In 2008 Microsoft hinted that future versions of Windows will partially support a Windows registry entry RealTimeIsUniversal that had been introduced many years earlier, when Windows NT supported RISC machines with UTC clocks, but had not been maintained since.^ Wikipedia, "Daylight saving time", Microsoft Windows systems says that Vista introduces two sets of rules per location.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ Since clocks are advanced for the majority of the year and retarded for the minority of the year, it would seem better to have Standard Time in Summer, with Winter Time an hour behind.
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

^ It appears that Microsoft used to put the UK/EU transition time at 0200h UTC, rather than at 0100h GMT (in, at least, MSIE 4 in 1st release of Win98; and also in a version of NT).
  • Merlyn - Summer Time - J R Stockton 25 September 2009 9:14 UTC www.merlyn.demon.co.uk [Source type: FILTERED WITH BAYES]

[117]

References

Yellowed magazine cover containing mostly print that is too small to read. Near the top is "JOURNAL DE PARIS."
.
Franklin's 1784 letter about daylight had neither title nor byline.
^ Daylight Savings History of Daylight Saving Time Follows the history of daylight saving time from when it was first conceived by Benjamin Franklin to its use in about seventy countries around the world.
  • Daylight Savings Time - Associated Content - Topic 12 September 2009 11:57 UTC www.associatedcontent.com [Source type: General]

^ Actually, **Ben Franklin** is the one who first suggested the idea of Daylight Saving Time in **1784**.
  • It's Time For Double Daylight Saving Time - Raw Fisher 12 September 2009 11:57 UTC voices.washingtonpost.com [Source type: General]

[17]
Pamphlet cover showing a large British flag in red, white, and dark blue, with the large title "THE WASTE OF DAYLIGHT", an unreadable subtitle, and "WILLIAM WILLETT" near the bottom.
William Willett's pamphlet promoting DST went through nineteen editions.[24]
  1. ^ a b c DST practices and controversies:
    • Michael Downing. Spring Forward: The Annual Madness of Daylight Saving Time. Shoemaker & Hoard; 2005. ISBN 1-59376-053-1.
    • David Prerau. Seize the Daylight: The Curious and Contentious Story of Daylight Saving Time. Thunder’s Mouth Press; 2005. ISBN 1-56025-655-9. The British version, focusing on the UK, is Saving the Daylight: Why We Put the Clocks Forward. Granta Books; ISBN 1-86207-796-7.
  2. ^ a b George Gibbs. Hudson, George Vernon 1867–1946. In: Dictionary of New Zealand Biography. 2007-06-22.
  3. ^ a b c James C. Benfield. Statement to the U.S. House, Committee on Science, Subcommittee on Energy. In: Energy Conservation Potential of Extended and Double Daylight Saving Time. 2001-05-24. (Serial 107-30).
  4. ^ a b Effect on those whose hours are set by the sun:
  5. ^ a b Rick Kissell. Daylight-saving dock ratings. Variety. 2007-03-20.
  6. ^ a b Susan A. Ferguson; David F. Preusser; Adrian K. Lund; Paul L. Zador; Robert G. Ulmer. Daylight saving time and motor vehicle crashes: the reduction in pedestrian and vehicle occupant fatalities [PDF]. American Journal of Public Health. 1995;85(1):92–95. doi:10.2105/AJPH.85.1.92. PMID 7832269. PMC 1615292.
  7. ^ a b Roscoe G. Bartlett. Statement to the U.S. House, Committee on Science, Subcommittee on Energy. In: Energy Conservation Potential of Extended and Double Daylight Saving Time. 2001-05-24. (Serial 107-30).
  8. ^ a b c d e f g Myriam B.C. Aries; Guy R. Newsham. Effect of daylight saving time on lighting energy use: a literature review [PDF]. Energy Policy. 2008;36(6):1858–1866. doi:10.1016/j.enpol.2007.05.021.
  9. ^ a b Peter G. Neumann. Computer-Related Risks. Addison–Wesley; 1994. ISBN 0-201-55805-X. Computer date and time problems.
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  47. ^ Brendan Cronin; Elizabeth Garnsey (2007-10-19) (PDF). Daylight saving in GB; is there evidence in favour of clock time on GMT?. Dept. of Engineering, University of Cambridge. http://www.eng.cam.ac.uk/news/stories/2007/BSTvGMT/garnsey_gmt_policy_191007.pdf. 
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  53. ^ Daylight savings time. Session Weekly. 1991. Minnesota House Public Information Office. "... the Minneapolis Star, Jan. 28, 1959 ... [stated] 'Farmers complained that they cannot get into the fields any earlier than under standard time ... because the morning sun does not dry the dew "on daylight savings time." ' "
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  63. ^ Clock shifts and accidents:
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  68. ^ Debby Golonka. Yahoo Health. Prevent household fires; 2007-03-13.
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  74. ^ a b Alex Beam. Dim-witted proposal for daylight time. Boston Globe. 2005-07-26.
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  76. ^ DST and circadian rhythm:
    • Pablo Valdez; Candelaria Ramírez; Aída García. Adjustment of the sleep–wake cycle to small (1–2h) changes in schedule. Biological Rhythm Research. 2003;34(2):145–155. doi:10.1076/brhm.34.2.145.14494.
    • Thomas Kantermann; Myriam Juda; Martha Merrow; Till Roenneberg. The human circadian clock's seasonal adjustment is disrupted by daylight saving time. Current Biology. 2007;17(22):1996–2000. doi:10.1016/j.cub.2007.10.025. PMID 17964164. Lay summary: ABC Science Online, Australia, 2007-10-25.
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  79. ^ Nataliya Shirinskikh, translator. Kazakhstan canceled shifting to the 'summer' and 'winter' time. Kazakhstan Today. 2005-03-16.
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  89. ^ Robertson Davies. The Diary of Samuel Marchbanks. Clarke, Irwin; 1947. OCLC 1246640. XIX, Sunday.
  90. ^ Seize the Daylight. p. 117.
  91. ^ Seize the Daylight. p. xi.
  92. ^ Seize the Daylight. p. 12–24.
  93. ^ Seize the Daylight. p. 72–73.
  94. ^ a b Seize the Daylight. p. 51–70.
  95. ^ Seize the Daylight. p. 80–101.
  96. ^ Seize the Daylight. p. 103–110.
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  99. ^ Seize the Daylight. p. 115–118.
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  103. ^ Paige Taylor. Daylight saving at a sunset out west. The Australian. 2009-05-18.
  104. ^ Royal Society for the Prevention of Accidents. Single/Double Summer Time policy paper [PDF]; October 2006.
  105. ^ Seize the Daylight. p. xv.
  106. ^ Daylight saving time and its variants:
    • Richard A. Meade. Language change in this century. English Journal. 1978;67(9):27–30. doi:10.2307/815124.
    • daylight-saving time. In: Joseph P. Pickett et al., editors. The American Heritage Dictionary of the English Language. 4th ed. Boston: Houghton Mifflin; 2000. ISBN 0-395-82517-2. "or daylight-savings time"
    • Merriam–Webster's Online Dictionary. "called also daylight saving, daylight savings, daylight savings time, daylight time" daylight saving time. [cited 2009-02-13].
    • 15 U.S.C. § 260a notes [cited 2007-05-09]. "Congressional Findings; Expansion of Daylight Saving Time"
  107. ^ Brent Hopkins. Spring ahead? that's so last year. On Sunday, we will all ... march forward. Is this a good thing? That all depends. Los Angeles Daily News. 2007-03-10.
  108. ^ Steve Lohr. Time change a 'mini-Y2K' in tech terms. New York Times. 2007-03-05.
  109. ^ A. Gut; L. Miclea; Sz. Enyedi; M. Abrudean; I. Hoka. Database globalization in enterprise applications. In: 2006 IEEE International Conference on Automation, Quality and Testing, Robotics. 2006. p. 356–359.
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  111. ^ HP-UX Reference: HP-UX 11i Version 3. Hewlett–Packard Co; 2007. tztab(4).
  112. ^ IEEE Std 1003.1-2004. The Open Group; 2004. Other environment variables.
  113. ^ Microsoft Corp. Daylight saving time help and support center; 2007-09-14.
  114. ^ Microsoft Corp. Visual Studio and daylight saving time change; 2007.
  115. ^ Lingnu Open Source Consulting. Windows daylight savings timezones for Israel; 2009.
  116. ^ Microsoft Corp. Microsoft support entry regarding daylight saving time in Israel; 2007. Hebrew.
  117. ^ Markus Kuhn. Computer Laboratory, University of Cambridge. IBM PC Real Time Clock should run in UT; 2009-02-10.

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Simple English


Daylight saving time (DST) is the local time adopted by many countries during summer. Typically, clocks are adjusted by moving the time forward by one hour in late winter or early spring. When DST ends in autumn, clocks are turned back to their the normal time.

DST was introduced in many countries to use the extra daylight available during summer. DST helps stores that sell to people after they get off work, but it hurts farmers and others whose hours are set by the sun. It cuts traffic accident rates. Sometimes it can reduce energy costs, but it can also increase them.

The United States, Australia (not Queensland or Western Australia), the United Kingdom, Canada and many other countries have DST. In Europe, DST is called summer time. Iceland is the only country in Europe without DST.


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