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Time Zones

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How time zones work around the world, from UTC to the most unusual offsets.

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What is a time zone?

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  1. 1What is a time zone?
    An area that observes a uniform standard time for legal, commercial, and social purposes, defined by a standard offset from Coordinated Universal Time (UTC).
  2. 2What is UTC?
    Coordinated Universal Time - the worldwide standard time reference, replacing Greenwich Mean Time (GMT) as the international time standard.
  3. 3What is the UTC offset range?
    UTC offsets range from UTC−12:00 to UTC+14:00, usually in whole hours but sometimes offset by 30 or 45 minutes (e.g., India UTC+5:30, Nepal UTC+5:45).
  4. 4What is Daylight Saving Time (DST)?
    Practice of setting clocks forward by one hour during spring/summer months. Not all regions observe it. Increases UTC offset during active period.
  5. 5UTC−12:00
    Baker Island, Howland Island (uninhabited US territories in the Pacific).
  6. 6UTC−10:00
    Hawaii (USA), Cook Islands, most of French Polynesia. During DST: Aleutian Islands (Alaska).
  7. 7UTC−08:00
    Pitcairn Islands (no DST). During DST: California, Nevada, Washington, Oregon, British Columbia.
  8. 8UTC−05:00
    Colombia, Peru, Panama, Jamaica, Cayman Islands, Ecuador (most). During DST: US Eastern Time (New York, Washington DC, Florida).
  9. 9UTC−03:30
    Newfoundland (Canada) - one of the few half-hour offset zones.
  10. 10UTC−03:00
    Argentina, Brazil (most), Uruguay, Suriname, French Guiana, Falkland Islands.
  11. 11UTC+00:00
    Iceland, Ghana, Senegal, Mali, Burkina Faso. During DST: UK, Ireland, Portugal (most), Canary Islands.
  12. 12UTC+01:00
    Algeria, Nigeria, Angola, Tunisia, Morocco. During DST: Most of Western Europe (France, Germany, Italy, Spain, Belgium, Netherlands, Poland, etc.).
  13. 13UTC+02:00
    South Africa, Botswana, Zimbabwe, Libya, Namibia. During DST: Eastern Europe (Greece, Finland, Romania, Ukraine, Israel, Egypt).
  14. 14UTC+03:00
    Saudi Arabia, Ethiopia, Kenya, Tanzania, Iraq, Kuwait, Qatar, Bahrain, Russia (most European part), Turkey, Yemen.
  15. 15UTC+03:30
    Iran - one of the few half-hour offset zones.
  16. 16UTC+04:30
    Afghanistan - one of the few half-hour offset zones.
  17. 17UTC+05:30
    India, Sri Lanka - half-hour offset.
  18. 18UTC+05:45
    Nepal - one of only two 45-minute offset zones (unique!).
  19. 19UTC+06:30
    Myanmar, Cocos (Keeling) Islands - half-hour offset.
  20. 20UTC+08:00
    China (entire country uses one zone!), Singapore, Malaysia, Philippines, Hong Kong, Taiwan, Western Australia, Mongolia (most).
  21. 21UTC+08:45
    Eucla, Western Australia - one of only two 45-minute offset zones (unique!).
  22. 22UTC+09:30
    Northern Territory (Australia). During DST: South Australia.
  23. 23UTC+12:45
    Chatham Islands (New Zealand) - 45-minute offset during DST.
  24. 24UTC+14:00
    Line Islands (Kiribati) - the easternmost (and latest) time zone in the world!

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