List of time zones

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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, the zones must be divided. One list that does so is the tz database. See list of tz 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.

[edit] UTC-12, Y

[edit] UTC-11, X

[edit] UTC-10, W

[edit] UTC-9:30, V†

[edit] UTC-9, V

[edit] UTC-8, U

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

[edit] UTC-7, T

Principal cities: El Paso, Denver, Albuquerque, Phoenix, Salt Lake City, Edmonton, Calgary, Yellowknife

[edit] UTC-6, S

Principal cities: Kansas City, Memphis, New Orleans, Houston, Austin, San Antonio, Dallas, Chicago, St. Louis, Milwaukee, Minneapolis, Winnipeg, Regina, Saskatoon, Santiago, San José, San Salvador, Tegucigalpa, Mexico City, Managua

[edit] UTC-5, R

Principal cities: Boston, New York, Philadelphia, Pittsburgh, Baltimore, Washington, D.C., Atlanta, Miami, Cleveland, Louisville, Columbus, Cincinnati, Detroit, Lima, Montréal, Québec, Quito, Ottawa, Toronto, Bogotá, Havana, Quito, Port-au-Prince, Kingston, Panama City, Iqaluit

[edit] UTC-4:30, Q†

[edit] UTC-4, Q

[edit] UTC-3:30, P†

[edit] UTC-3, P

The province of San Luis change his time zone to UTC-4 and save DST again on March 15, 2009.

[edit] UTC-2, O

[edit] UTC-1, N

Principal cities: Praia, Mindelo, Ponta Delgada, Angra do Heroísmo

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

[edit] UTC, 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

[edit] UTC+1, A

Principal cities: Amsterdam, Berlin, Vienna, Brussels, Kinshasa, Lagos, Madrid, Paris, Rome, Oslo
(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

[edit] UTC+2, 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

[edit] UTC+3, C

Principal cities: Moscow, Baghdad, Khartoum, Saint Petersburg

[edit] UTC+3:30, C†

Principal cities: Tehran, Mashhad, Esfahan, Tabriz

[edit] UTC+4, D

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

[edit] UTC+4:30, D†

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

[edit] UTC+5, E

Principal cities: Karachi, Lahore, Faisalabad, Rawalpindi

[edit] UTC+5:30, E†

Principal cities: Bengaluru, Chennai, Colombo, Delhi, Hyderabad, Kolkata, Mumbai, Thiruvananthapuram

[edit] UTC+5:45, E‡

Principal cities: Kathmandu, Biratnagar, Patan, Pokhara

[edit] UTC+6, F

Principal cities: Dhaka, Chittagong, Novosibirsk, Khulna

[edit] UTC+6:30, F†

[edit] UTC+7, G

[edit] UTC+8, H

[edit] UTC+8:45, H‡

[edit] UTC+9, I

[edit] UTC+9:30, I†

[edit] UTC+10, K

[edit] UTC+10:30, K†

[edit] UTC+11, L

[edit] UTC+11:30, L†

[edit] UTC+12, M

[edit] UTC+12:45, M‡

[edit] UTC+13, M†

[edit] UTC+14, M†

[edit] See also

[edit] References

  1. ^ "The World Clock - Time Zones". TimeDateTool.com. http://devmatrix.ath.cx/timedatetool.com/worldclock.php. Retrieved on 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 on 2007-09-24. 
  6. ^ "Venezuela creates own time zone". BBC News. 2007-12-09. http://news.bbc.co.uk/2/hi/americas/7134927.stm. Retrieved on 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 on 2007-09-24. 
  9. ^ "Time zone in Tbilisi". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=371. Retrieved on 2007-09-24. 
  10. ^ "Time zone in Colombo". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=389. Retrieved on 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 on 2007-09-24. 
  12. ^ "Time zone in Bishkek". Time and Date.com. http://www.timeanddate.com/worldclock/timezone.html?n=384. Retrieved on 2007-09-24. 
  13. ^ 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 on 2007-09-24. 
  14. ^ "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 on 2007-09-24. 
v • d • e
Time offsets from Coordinated Universal Time (UTC)
−12 · −11 · −10 · −9:30 · −9 · −8 · −7 · −6 · −5 · −4:30 · −4 · −3:30 · −3 · −2:30 · −2 · −1 · −0:44 · −0:25 · UTC (0) · +0:20 · +0:30 · +1 · +2 · +3 · +3:30 · +4 · +4:30 · +4:51 · +5 · +5:30 · +5:40 · +5:45 · +6 · +6:30 · +7 · +7:20 · +7:30 · +8 · +8:30 · +8:45 · +9 · +9:30 · +10 · +10:30 · +11 · +11:30 · +12 · +12:45 · +13 · +13:45 · +14
Daylight saving time (DST) · Northern Hemisphere · Southern Hemisphere · Historical Only
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