How many time zones does United States have?
The United States uses six primary time zones across the states, plus additional time zones in its territories.
Time zones are more than fixed UTC offsets. They contain regional rules that determine whether and when clocks change. Select a city and date when planning a future event.
United States time-zone identifiers
| Identifier | Current reference offset | Seasonal change |
|---|---|---|
| America/Adak | UTC-09:00 | Yes |
| America/Anchorage | UTC-08:00 | Yes |
| America/New_York | UTC-04:00 | Yes |
| America/North_Dakota/Beulah | UTC-05:00 | Yes |
| America/Boise | UTC-06:00 | Yes |
| America/North_Dakota/Center | UTC-05:00 | Yes |
| America/Chicago | UTC-05:00 | Yes |
| America/Denver | UTC-06:00 | Yes |
| America/Detroit | UTC-04:00 | Yes |
| Pacific/Honolulu | UTC-10:00 | No change detected |
| America/Indiana/Indianapolis | UTC-04:00 | Yes |
| America/Juneau | UTC-08:00 | Yes |
| America/Indiana/Knox | UTC-05:00 | Yes |
| America/Los_Angeles | UTC-07:00 | Yes |
| America/Kentucky/Louisville | UTC-04:00 | Yes |
| America/Indiana/Marengo | UTC-04:00 | Yes |
| America/Menominee | UTC-05:00 | Yes |
| America/Metlakatla | UTC-08:00 | Yes |
Planning calls with United States
Use the converter for a known time or the meeting planner when several participants are involved. Both tools apply date-aware time-zone rules and show local day changes.