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List of time zones by UTC offset: Wikis

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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-12, Y

UTC-11, X

UTC-10, W

UTC-09:30, V†

UTC-09, V

UTC-08, U

Principal cities: Seattle, Portland, San Francisco, Los Angeles, Vancouver, Whitehorse, Tijuana

UTC-07, T

Principal cities: Denver, Phoenix, Salt Lake City, Calgary, Yellowknife, Hermosillo, Ciudad Juárez

UTC-06, S

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.

UTC-05, R

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

UTC-04:30, Q†

UTC-04, Q

UTC-03:30, P†

UTC-03, P

The province of San Luis change his time zone to UTC-04 and save DST again on March 15, 2009.

UTC-02, O

UTC-01, N

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

UTC±0, Z

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

UTC+01, A

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

UTC+02, B

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

UTC+03, C

Principal cities: Moscow, Baghdad, Khartoum, Saint Petersburg

UTC+03:30, C†

Principal cities: Tehran, Mashhad, Esfahan, Tabriz

UTC+04, D

Principal cities: Baku, Samara, Tbilisi, Yerevan, Dubai

UTC+04:30, D†

Principal cities: Kabul, Herat, Kandahar, Mazar-i Sharif

UTC+05, E

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.

UTC+06, F

Principal cities: Astana, Almaty, Dhaka, Chittagong, Novosibirsk, Khulna, Sylhet

UTC+06:30, F†

UTC+07, G

UTC+08, H

UTC+08:45, H‡

UTC+09, I

UTC+09:30, I†

UTC+10, K

UTC+10:30, K†

UTC+11, L

UTC+11:30, L†

UTC+12, M

Ross Dependency**, McMurdo Station**, Amundsen-Scott South Pole Station**, unofficial

UTC+12:45, M‡

UTC+13, M†

UTC+14, M†

See also

References

  1. ^ "The World Clock - Time Zones". TimeDateTool.com. http://devmatrix.ath.cx/timedatetool.com/worldclock.php. Retrieved 2008-02-20. 
  2. ^ Designation of zone standard times 15USC263 notes
  3. ^ Part of Idaho in third zone 15USC264
  4. ^ Boundary line between mountain and Pacific zones, 49CFR71.9
  5. ^ "Time zone in Guatemala". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=94. Retrieved 2009-05-24. 
  6. ^ "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." 
  7. ^ a b Brazil changes time zone in SW Amazon region
  8. ^ "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. 
  9. ^ "Time zone in Tbilisi". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=371. Retrieved 2007-09-24. 
  10. ^ "Time zone in Colombo". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=389. Retrieved 2007-09-24. 
  11. ^ 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. 
  12. ^ "Time zone in Bishkek". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=384. Retrieved 2007-09-24. 
  13. ^ 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 
  14. ^ The Chinese Revolution of 1911, http://www.state.gov/r/pa/ho/time/ip/88116.htm, retrieved 2009-05-22 
  15. ^ 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 
  16. ^ 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. 
  17. ^ "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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