TZ Abbreviation Reference
v1.0.1Look up timezone abbreviations (EST, CET, JST…) and find their IANA equivalents.
Reference for timezone abbreviations — maps each abbreviation (e.g. EST, IST, CEST, JST) to its IANA timezone identifier, UTC offset, and the regions that use it, noting ambiguous abbreviations that map to multiple offsets.
How to use- →Search by abbreviation (e.g. "IST", "PST", "CET") to see all matching IANA zones and their UTC offsets.
- →Click any abbreviation to see which countries or regions use it and in which season (standard vs. daylight saving).
- →Check the "Ambiguous" column — IST, for example, is used for India, Ireland, and Israel with different offsets.
- →Use the IANA zone lookup to go from an ambiguous abbreviation to a precise timezone identifier for your code.
44 entries found
| Abbreviation | Full Name | UTC Offset | IANA Name | DST | Region |
|---|---|---|---|---|---|
| UTC | Coordinated Universal Time | +00:00 | UTC | — | Global |
| GMT | Greenwich Mean Time | +00:00 | Europe/London | — | Europe/Africa |
| BST | British Summer Time | +01:00 | Europe/London | DST | UK |
| CET | Central European Time | +01:00 | Europe/Berlin | — | Europe |
| CEST | Central European Summer Time | +02:00 | Europe/Berlin | DST | Europe |
| EET | Eastern European Time | +02:00 | Europe/Helsinki | — | East Europe |
| EEST | Eastern European Summer Time | +03:00 | Europe/Helsinki | DST | East Europe |
| MSK | Moscow Standard Time | +03:00 | Europe/Moscow | — | Russia |
| AST | Atlantic Standard Time | -04:00 | America/Halifax | — | Atlantic Canada |
| ADT | Atlantic Daylight Time | -03:00 | America/Halifax | DST | Atlantic Canada |
| EST | Eastern Standard Time | -05:00 | America/New_York | — | Eastern US/Canada |
| EDT | Eastern Daylight Time | -04:00 | America/New_York | DST | Eastern US/Canada |
| CST | Central Standard Time | -06:00 | America/Chicago | — | Central US/Canada |
| CDT | Central Daylight Time | -05:00 | America/Chicago | DST | Central US/Canada |
| MST | Mountain Standard Time | -07:00 | America/Denver | — | Mountain US/Canada |
| MDT | Mountain Daylight Time | -06:00 | America/Denver | DST | Mountain US/Canada |
| PST | Pacific Standard Time | -08:00 | America/Los_Angeles | — | Pacific US/Canada |
| PDT | Pacific Daylight Time | -07:00 | America/Los_Angeles | DST | Pacific US/Canada |
| AKST | Alaska Standard Time | -09:00 | America/Anchorage | — | Alaska |
| AKDT | Alaska Daylight Time | -08:00 | America/Anchorage | DST | Alaska |
| HST | Hawaii Standard Time | -10:00 | Pacific/Honolulu | — | Hawaii |
| BRT | Brasília Time | -03:00 | America/Sao_Paulo | — | Brazil |
| BRST | Brasília Summer Time | -02:00 | America/Sao_Paulo | DST | Brazil |
| ART | Argentina Time | -03:00 | America/Argentina/Buenos_Aires | — | Argentina |
| CLT | Chile Standard Time | -04:00 | America/Santiago | — | Chile |
| WET | Western European Time | +00:00 | Europe/Lisbon | — | West Europe |
| WEST | Western European Summer Time | +01:00 | Europe/Lisbon | DST | West Europe |
| WAT | West Africa Time | +01:00 | Africa/Lagos | — | West Africa |
| CAT | Central Africa Time | +02:00 | Africa/Harare | — | Central Africa |
| EAT | East Africa Time | +03:00 | Africa/Nairobi | — | East Africa |
| GST | Gulf Standard Time | +04:00 | Asia/Dubai | — | Gulf |
| PKT | Pakistan Standard Time | +05:00 | Asia/Karachi | — | Pakistan |
| IST | Indian Standard Time | +05:30 | Asia/Kolkata | — | India |
| BST_BD | Bangladesh Standard Time | +06:00 | Asia/Dhaka | — | Bangladesh |
| ICT | Indochina Time | +07:00 | Asia/Bangkok | — | Indochina |
| CST_CN | China Standard Time | +08:00 | Asia/Shanghai | — | China |
| HKT | Hong Kong Time | +08:00 | Asia/Hong_Kong | — | Hong Kong |
| SGT | Singapore Time | +08:00 | Asia/Singapore | — | Singapore |
| JST | Japan Standard Time | +09:00 | Asia/Tokyo | — | Japan |
| KST | Korea Standard Time | +09:00 | Asia/Seoul | — | Korea |
| AEST | Australian Eastern Standard Time | +10:00 | Australia/Sydney | — | East Australia |
| AEDT | Australian Eastern Daylight Time | +11:00 | Australia/Sydney | DST | East Australia |
| NZST | New Zealand Standard Time | +12:00 | Pacific/Auckland | — | New Zealand |
| NZDT | New Zealand Daylight Time | +13:00 | Pacific/Auckland | DST | New Zealand |