Reference
All Time Zones
419 IANA time zones grouped by region. Click any zone to see the current time, sunrise, moon phase, and more.
Africa 52
America 143
Antarctica 11
Arctic 1
Asia 83
Atlantic 10
Australia 11
Europe 58
Indian 11
Pacific 38
UTC 1
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About IANA time zones
The IANA Time Zone Database, also called the tz database or Olson database, is the standard reference used by operating systems, programming languages, and applications worldwide. Each entry gets a unique identifier in the format Region/City, for example America/New_York or Europe/London.
These identifiers carry more than just a UTC offset. They encode the full rule history for each zone: every past and scheduled change to standard time, every daylight saving transition, and every political boundary shift that affected local clocks. That history is what makes software work correctly across time boundaries and historical dates.
A single country often spans several zones, and the city in a zone name is a reference point, not a boundary. If your city is not listed, look for the major city in your region that shares your offset and DST schedule. The zone detail page shows the current offset, sunrise and sunset times, moon phase, and a live clock for any zone in this list.