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Contents
- 1 UTC-12, Y
- 2 UTC-11, X
- 3 UTC-10, W
- 4 UTC-09:30, V†
- 5 UTC-09, V
- 6 UTC-08, U
- 7 UTC-07, T
- 8 UTC-06, S
- 9 UTC-05, R
- 10 UTC-04:30, Q†
- 11 UTC-04, Q
- 12 UTC-03:30, P†
- 13 UTC-03, P
- 14 UTC-02, O
- 15 UTC-01, N
- 16 UTC±0, Z
- 17 UTC+01, A
- 18 UTC+02, B
- 19 UTC+03, C
- 20 UTC+03:30, C†
- 21 UTC+04, D
- 22 UTC+04:30, D†
- 23 UTC+05, E
- 24 UTC+05:30, E†
- 25 UTC+05:45, E‡
- 26 UTC+06, F
- 27 UTC+06:30, F†
- 28 UTC+07, G
- 29 UTC+08, H
- 30 UTC+08:45, H‡
- 31 UTC+09, I
- 32 UTC+09:30, I†
- 33 UTC+10, K
- 34 UTC+10:30, K†
- 35 UTC+11, L
- 36 UTC+11:30, L†
- 37 UTC+12, M
- 38 UTC+12:45, M‡
- 39 UTC+13, M†
- 40 UTC+14, M†
- 41 See also
- 42 References
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This is a list of time zones, sorted by time offsets from Coordinated Universal Time (UTC). Countries and regions observing the respective time zones are listed under it. This only gives current offsets. For more detailed and historic information, these zones must be divided. One list that does so is the list of tz database time zones. Also see a helpful map (which is not necessarily completely up to date).
Regions marked with asterisks (* or **) observe daylight saving time: add one hour in summer (* for Northern Hemisphere summer; ** for Southern Hemisphere). Note, some locations use GMT (Greenwich Mean Time) instead of UTC (Coordinated Universal Time) in the definition of local time. For the purposes of this summary, the distinction is ignored.
Some zones north-south of each other in the mid Pacific differ by 24 hours in time: they have the same time of day but differ by a full day. The two extreme time zones on Earth (both in the mid Pacific) differ by 26 hours. A particular day starts earlier in countries with a more positive UTC offset. Thus the first occurrence of a date will be in UTC+14 and the last of the same date in UTC−12. This gives the interesting feature that during one hour each day there are three different dates in use on land around the world, e.g. at 10:30 UTC Monday it is already 00:30 Tuesday in the Line Islands (UTC+14) while the time is 23:30 Sunday in Samoa (UTC-11).[1]
Time zone abbreviations are almost always customary, not legal—those listed here only exist in English and are somewhat arbitrary. English time zone names below generally only apply to English-speaking areas. The CIA and NAO disagree on the time kept by some Russian oblasts, so both are given below—this may be due to a recent time zone change.
UTC-09:30, V†
Principal cities: Seattle, Portland, San Francisco, Los Angeles, Vancouver, Whitehorse, Tijuana
Principal cities: Denver, Phoenix, Salt Lake City, Calgary, Yellowknife, Hermosillo, Ciudad Juárez
- Canada (MT—Mountain Time Zone)
- Mexico
- United States (MT—Mountain Time Zone)
- Arizona (the Navajo Nation* does observe DST, but the Hopi Reservation, an enclave within it, does not observe DST),
- Colorado*,
- Idaho*
-
- A 1966 legislative error legally placed southern Idaho in the North American Central Time Zone. The 1966 Uniform Time Act added Atlantic standard time as the first zone, renumbering mountain standard time from the third zone to the fourth zone,[2] but the portion of the original 1918 Standard Time Act which placed southern Idaho in the "third zone"[3] was not changed in 1966. Nevertheless, southern Idaho is now officially in the Mountain Time Zone according to the Code of Federal Regulations.[4]
- Kansas*
- Montana*,
- Nebraska (western)*,
- Nevada*
- New Mexico*,
- North Dakota (southwestern)*,
- Oklahoma
- Kenton* — This unincorporated community, located near the far western edge of the Panhandle, unofficially observes Mountain Time. The legal time for all of Oklahoma, including Kenton, is Central Time (UTC-6 standard, UTC-5 summer).
- Oregon
- South Dakota (western)*,
- Texas*
- Utah*,
- Wyoming*
Principal cities: Belize City, Chicago, Dallas, Guadalajara, Guatemala City, Houston, Managua, Mexico City, Minneapolis, Monterrey, New Orleans, Regina, St. Louis, San José, San Salvador, Tegucigalpa.
- Belize
- Canada (CT—North American Central Time Zone)
- Manitoba*,
- Nunavut*, (rest of territory is on Mountain Time and Eastern Time)
- Ontario*
- Northwestern Ontario west of 90° West (except Atikokan area, New Osnaburgh and Pickle Lake area, and Shebandowan and Upsala area), and Big Trout Lake area east of 90° West,
- Saskatchewan (except Lloydminster and surrounding area)
- Chile
- Costa Rica
- Ecuador
- El Salvador
- Guatemala (observed DST in 2006, did not in 2007-2009)[5]
- Honduras
- Mexico
- Nicaragua
- United States (CT—Central Time Zone)
- Alabama*,
- Arkansas*,
- Florida
- Illinois*,
- Indiana*
- northwestern
- southwestern
- Iowa*,
- Kansas (most of state)*,
- Kentucky (western)*,
- Louisiana*,
- Michigan (the counties bordering Wisconsin)*
- Minnesota*,
- Mississippi*,
- Missouri*,
- Nebraska (central and eastern)*,
- North Dakota (most of state)*,
- Oklahoma (most of state)*,
- South Dakota (eastern)*,
- Tennessee*
- Texas (most of state)*,
- Wisconsin*
Principal cities: Boston, New York, Philadelphia, Washington, D.C., Atlanta, Miami, Cleveland, Cincinnati, Detroit, Lima, Ottawa, Montréal, Québec, Quito, Toronto, Bogotá, Havana, Port-au-Prince, Kingston, Iqaluit
- Bahamas*
- Canada (ET—North American Eastern Time Zone)
- Nunavut*, (rest of territory is on Mountain Time and Central Time)
- Ontario
- Quebec (most of province)*
- Cayman Islands
- Colombia
- Cuba*
- Ecuador
- Haiti
- Jamaica
- Navassa Island
- Panama
- Peru
- Turks and Caicos Islands*
- United States (ET—Eastern Time Zone)
- Alabama
- The legal time for the entire state is Central Time, one hour behind this zone. However, Phenix City and several nearby communities unofficially observe Eastern Time (with daylight time). Phenix City lies on the opposite side of the Chattahoochee River from the much larger city of Columbus, Georgia.
- Connecticut*,
- Delaware*,
- District of Columbia*,
- Florida
- Georgia*,
- Indiana (most of state)*,
- Kentucky (eastern)*,
- Maine*,
- Maryland*,
- Massachusetts*,
- Michigan (most of state)*,
- New Hampshire*,
- New Jersey*,
- New York*,
- North Carolina*,
- Ohio*,
- Pennsylvania*,
- Rhode Island*,
- South Carolina*,
- Tennessee*
- Vermont*,
- Virginia*,
- West Virginia*
UTC-04:30, Q†
UTC-03:30, P†
The province of San Luis change his time zone to UTC-04 and save DST again on March 15, 2009.
- Brazil - official time
- Alagoas,
- Amapá,
- Bahia (no DST since 2003),
- Ceará,
- Distrito Federal**,
- Espírito Santo**,
- Goiás**,
- Maranhão,
- Minas Gerais**,
- Pará (all state is in UTC−3 since June 24, 2008), [7]
- Paraíba,
- Paraná**,
- Pernambuco,
- Piauí,
- Rio de Janeiro**,
- Rio Grande do Norte,
- Rio Grande do Sul**,
- Santa Catarina**,
- São Paulo**,
- Sergipe,
- Tocantins
- French Guiana
- Greenland
- Saint-Pierre and Miquelon*
- Suriname
- Uruguay**
Principal cities: Praia, Ponta Delgada
- Territories observing European Union DST rules
- (DST begins 1 a.m. UTC on the last Sunday in March and ends 1 a.m. UTC on the last Sunday in October)
- Territories not observing DST
Principal cities: London, Dublin, Abidjan, Casablanca, Accra, Lisbon
The crew of the International Space Station observes this timezone in their daily routine.[citation needed]
- Territories observing European Union DST rules
- (DST begins 1 a.m. UTC on the last Sunday in March and ends 1 a.m. UTC on the last Sunday in October)
- Territories not observing DST
Principal cities: Amsterdam, Berlin, Budapest, Vienna, Prague, Brussels, Kinshasa, Lagos, Madrid, Paris, Rome, Stockholm, Oslo, Warsaw
(also called CET: Central Europe Time)
- Territories observing European Union DST rules
- (DST begins 01:00 UTC on the last Sunday in March and ends 01:00 UTC on the last Sunday in October)
- Territories observing their own DST rules
- Territories not observing DST
Principal cities: Athens, Sofia, Cairo, Istanbul, Helsinki, Jerusalem, Johannesburg, Bucharest
- Territories observing European Union DST rules
- (DST begins 01:00 UTC on the last Sunday in March and ends 01:00 UTC on the last Sunday in October)
- Territories observing DST rules for Russia, Belarus and Armenia
- (DST begins 02:00. local standard time on the last Sunday in March and ends 3 a.m. local daylight saving time on the last Sunday in October, in each time zone)
- Territories observing their own DST rules
- Territories not observing DST
Principal cities: Moscow, Baghdad, Khartoum, Saint Petersburg
UTC+03:30, C†
Principal cities: Tehran, Mashhad, Esfahan, Tabriz
Principal cities: Baku, Samara, Tbilisi, Yerevan, Dubai
UTC+04:30, D†
Principal cities: Kabul, Herat, Kandahar, Mazar-i Sharif
Principal cities: Karachi, Lahore, Faisalabad, Rawalpindi
UTC+05:30, E†
Principal cities: Ahmedabad, Bengaluru, Chennai, Colombo, Delhi, Hyderabad, Kolkata, Mumbai, Thiruvananthapuram
UTC+05:45, E‡
Principal cities: Kathmandu, Biratnagar, Patan, Pokhara
- Nepal
- Nepal's time zone of UTC+5:45 was adopted in 1986.[11] This is the nearest quarter-hour from Greenwich to the local mean time of Nepal's capital Kathmandu, which is at 85°19′E or 5:41:16. Old CIA maps, 1995 and earlier, have Nepal at UTC+5:40, which may be their approximation of Kathmandu's local mean time.
Principal cities: Astana, Almaty, Dhaka, Chittagong, Novosibirsk, Khulna, Sylhet
UTC+06:30, F†
- Australia (AWST—Australian Western Standard Time)
- Western Australia (most of state)**
- Western Australia began a three-year experiment with usage of summer (daylight saving) time on December 3, 2006. Daylight saving time will be used from October through March, with the late start in 2006 due to late passage of the relevant legislation. A referendum held on May 19 2009 concluded that daylight saving will not be held in the future.
- Brunei
- China, People's Republic of
- The whole of the People's Republic of China has the same time, which makes this time zone exceptionally wide. In the extreme west of China the sun is at its highest at 15:00, in the extreme east at 11:00. It also means that on the short (76 km) frontier with Afghanistan, the official time change is 3 hours and 30 minutes. The two western autonomous regions of China, Xinjiang and Tibet, were in UTC+6 during the Republic era (1912–1949), but were moved to UTC+8 after the founding of the People's Republic of China in 1949. Today, residents of the two autonomous regions do everything 2 hours late. For example, lunch is at 14:00 and business hours end around 19:00.[citation needed]
- China, Republic of (Taiwan, Penghu, Kinmen, and Matsu)
- In 1895, when Japan took over the island of Taiwan (including the Pescadores), Taiwan was placed within Japan's Western Standard Time (UTC+8) along with the Yaeyama Islands and Miyako Island (now the southwestern part of Okinawa Prefecture, Japan). However, in 1937, Japan abolished its Western Standard Time so Taiwan then observed Japan Standard Time (UTC+09). Taiwan reverted back to UTC+08 after World War II with intermittent usage of daylight saving time until 1979.
- Hong Kong
- In 1904, Royal Observatory Hong Kong began to adopt Greenwich Mean Time as the basis for Hong Kong Time (8 hours in advance of Greenwich Mean Time).[13] The practice pre-dates the establishment of Republic of China (1911)[14] and People's Republic of China (1949).[15] Prior World War II, the Hong Kong Time was determined by astronomical observations at the Observatory using a 6-inch Lee Equatorial and a 3-inch Transit Circle.[13] Now, the current time can be obtained from the Observatory's Network Time Server.
- Indonesia (Central/WITA)
- Macau (Macao Standard Time)
- Malaysia
- The more populous Peninsular Malaysia is geographically in UTC+7, but changed to UTC+8 in 1982 to follow that of Malaysian Borneo (which makes up only 20% of total population), so that the whole country lies in the same time zone.[16]
- Mongolia
- Philippines
- Even if the Philippines has only one official time zone, Davao City, located at the Southeast part of the country is ten minutes earlier than the whole archipelago.[citation needed] This also means that every official time in Davao City, such as flight and ship departure, is 10 minutes earlier than Manila. Only the programmes that are broadcasted nationwide follows the Manila time. This 10 minute discrepancy however does not bother travellers in the city.
- Russia
- Singapore
- Geographically in UTC+7, but changed to UTC+8 in 1982 to follow that of Malaysia.[16]
UTC+08:45, H‡
UTC+09:30, I†
- Australia (ACST—Australian Central Standard Time)
UTC+10:30, K†
UTC+11:30, L†
Ross Dependency**, McMurdo Station**, Amundsen-Scott South Pole Station**, unofficial
UTC+12:45, M‡
See also
References
- ^ "The World Clock - Time Zones". TimeDateTool.com. http://devmatrix.ath.cx/timedatetool.com/worldclock.php. Retrieved 2008-02-20.
- ^ Designation of zone standard times 15USC263 notes
- ^ Part of Idaho in third zone 15USC264
- ^ Boundary line between mountain and Pacific zones, 49CFR71.9
- ^ "Time zone in Guatemala". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=94. Retrieved 2009-05-24.
- ^ "Venezuela creates own time zone". BBC News. 2007-12-09. http://news.bbc.co.uk/2/hi/americas/7134927.stm. Retrieved 2007-12-10. "Venezuela creates its own unique time zone on Sunday, putting the clock back half-an-hour on a permanent basis."
- ^ a b Brazil changes time zone in SW Amazon region
- ^ "Times are a' changing in Georgia". BBC News. June 27, 2004. http://news.bbc.co.uk/1/hi/world/europe/3843511.stm. Retrieved 2007-09-24.
- ^ "Time zone in Tbilisi". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=371. Retrieved 2007-09-24.
- ^ "Time zone in Colombo". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=389. Retrieved 2007-09-24.
- ^ Chadwick, Mike (December 28, 1997). "To Every Times, There Is A Purpose". St. Petersburg Times. http://www.sptimes.com/Travel97/10198/To_Every_Times__There.html. Retrieved 2007-09-24.
- ^ "Time zone in Bishkek". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=384. Retrieved 2007-09-24.
- ^ a b History of Hong Kong Time Service, http://www.hko.gov.hk/gts/time/History_of_HK_Time_Service.htm, retrieved 2009-05-22
- ^ The Chinese Revolution of 1911, http://www.state.gov/r/pa/ho/time/ip/88116.htm, retrieved 2009-05-22
- ^ Zedong, Mao (1949), Proclaimation of the establishment of the People's Republic of China, http://www.isop.ucla.edu/eas/documents/mao490921.htm, retrieved 2009-05-22
- ^ a b Aslaksen, Helmer. "Why is Singapore in the "Wrong" Time Zone?". NUS: Department of Mathematics. http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html. Retrieved 2007-09-24.
- ^ "In Marshall Islands, Friday Is Followed by Sunday". New York Times. August 22, 1993. http://query.nytimes.com/gst/fullpage.html?res=9F0CE1D6163EF931A1575BC0A965958260&sec=&spon=&partner=permalink&exprod=permalink. Retrieved 2007-09-24.
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