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Look up timezone abbreviations with UTC offsets, full names, and regions.
A timezone abbreviation is a short alphanumeric code (e.g., EST, GMT, JST) representing a specific time zone and its UTC offset, used to quickly identify regional time standards.
| Abbr | Full Name | Offset | Region |
|---|---|---|---|
| EST | Eastern Standard Time | UTC−5 | US East Coast |
| EDT | Eastern Daylight Time | UTC−4 | US East Coast (summer) |
| CST | Central Standard Time | UTC−6 | US Central |
| CDT | Central Daylight Time | UTC−5 | US Central (summer) |
| MST | Mountain Standard Time | UTC−7 | US Mountain |
| MDT | Mountain Daylight Time | UTC−6 | US Mountain (summer) |
| PST | Pacific Standard Time | UTC−8 | US West Coast |
| PDT | Pacific Daylight Time | UTC−7 | US West Coast (summer) |
| AKST | Alaska Standard Time | UTC−9 | Alaska |
| HST | Hawaii Standard Time | UTC−10 | Hawaii |
| GMT | Greenwich Mean Time | UTC+0 | UK, West Africa |
| BST | British Summer Time | UTC+1 | UK (summer) |
| CET | Central European Time | UTC+1 | Western Europe |
| CEST | Central European Summer Time | UTC+2 | Western Europe (summer) |
| EET | Eastern European Time | UTC+2 | Eastern Europe |
| IST | India Standard Time | UTC+5:30 | India |
| CST (CN) | China Standard Time | UTC+8 | China |
| JST | Japan Standard Time | UTC+9 | Japan |
| KST | Korea Standard Time | UTC+9 | South Korea |
| AEST | Australian Eastern Standard Time | UTC+10 | Australia East |
| AEDT | Australian Eastern Daylight Time | UTC+11 | Australia East (summer) |
| NZST | New Zealand Standard Time | UTC+12 | New Zealand |
| NZDT | New Zealand Daylight Time | UTC+13 | New Zealand (summer) |
| AST | Atlantic Standard Time | UTC−4 | Atlantic Canada, Caribbean |
| BRT | BrasÃlia Time | UTC−3 | Brazil |
| WAT | West Africa Time | UTC+1 | West Africa |
| CAT | Central Africa Time | UTC+2 | Central Africa |
| EAT | East Africa Time | UTC+3 | East Africa |
| MSK | Moscow Standard Time | UTC+3 | Russia (Moscow) |
| SGT | Singapore Time | UTC+8 | Singapore, Malaysia |
| Zone | Standard | Daylight |
|---|---|---|
| Eastern | EST (UTC−5) | EDT (UTC−4) |
| Central | CST (UTC−6) | CDT (UTC−5) |
| Mountain | MST (UTC−7) | MDT (UTC−6) |
| Pacific | PST (UTC−8) | PDT (UTC−7) |
| Alaska | AKST (UTC−9) | AKDT (UTC−8) |
| Hawaii | HST (UTC−10) | No DST |
Formula
Local Time = UTC + Timezone OffsetUTC = Coordinated Universal Time — the global reference standard
Timezone Offset = Hours (and sometimes minutes) added or subtracted from UTC
Worked Example
Convert 3:00 PM UTC to EST
Did you know? There are over 40 unique UTC offsets in use worldwide, including unusual ones like UTC+5:45 (Nepal), UTC+8:45 (Australia Eucla), and UTC+13 (Tonga), which means some places are already in tomorrow relative to UTC.
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