Time Zone Abbreviations – North America
| Abbreviation | Time zone name | Other names | Offset |
|---|---|---|---|
| ADT | Atlantic Daylight Time | HAA | UTC -3 |
| AKDT | Alaska Daylight Time | UTC -8 | |
| AKST | Alaska Standard Time | UTC -9 | |
| AST | Atlantic Standard Time | AST, HNA | UTC -4 |
| AT | Atlantic Time | UTC -4:00 / -3:00 | |
| CDT | Central Daylight Time | HAC | UTC -5 |
| CST | Central Standard Time | CST, HNC | UTC -6 |
| CT | Central Time | UTC -6:00 / -5:00 | |
| EDT | Eastern Daylight Time | HAE, EDT | UTC -4 |
| EGST | Eastern Greenland Summer Time | UTC +0 | |
| EGT | East Greenland Time | UTC -1 | |
| EST | Eastern Standard Time | ET, HNE | UTC -5 |
| ET | Eastern Time | UTC -5:00 / -4:00 | |
| GMT | Greenwich Mean Time | UTC +0 | |
| HDT | Hawaii-Aleutian Daylight Time | UTC -9 | |
| HST | Hawaii Standard Time | UTC -10 | |
| MDT | Mountain Daylight Time | HAR | UTC -6 |
| MST | Mountain Standard Time | HNR | UTC -7 |
| MT | Mountain Time | UTC -7:00 / -6:00 | |
| NDT | Newfoundland Daylight Time | HAT | UTC -2:30 |
| NST | Newfoundland Standard Time | HNT | UTC -3:30 |
| PDT | Pacific Daylight Time | HAP | UTC -7 |
| PMDT | Pierre & Miquelon Daylight Time | UTC -2 | |
| PMST | Pierre & Miquelon Standard Time | UTC -3 | |
| PST | Pacific Standard Time | PT, HNP | UTC -8 |
| PT | Pacific Time | UTC -8:00 / -7:00 | |
| WGST | Western Greenland Summer Time | UTC -1 | |
| WGT | Western Greenland Time | UTC -2 |
Time zones by continent/region
Time zones Tools
See Also
USNO's Precise Time services