There are nine time zones in the United States. The time zones are as follows:
| CODE | UNITED STATES TIME ZONE BOUNDARIES | UTC OFFSET |
| AST | ATLANTIC STANDARD TIME | UTC - 4 |
| EST | EASTERN STANDARD TIME | UTC - 5 |
| CST | CENTRAL STANDARD TIME | UTC - 6 |
| MST | MOUNTAIN STANDARD TIME | UTC - 7 |
| PST | PACIFIC STANDARD TIME | UTC - 8 |
| AKST | ALASKA STANDARD TIME | UTC - 9 |
| HAST | HAWAII-ALEUTIAN STANDARD TIME | UTC - 10 |
| SST | SAMOA STANDARD TIME | UTC - 11 |
| ChST | CHAMORRO STANDARD TIME | UTC +10 |
| Hawaii Time | Alaska Time | Pacific Time |
10:24:55 AMSunday, November 16, 2025 Hawaii Standard TimeUTC -10:00 Honolulu | 11:24:55 AMSunday, November 16, 2025 Alaska Standard TimeUTC -09:00 Anchorage | 12:24:55 PMSunday, November 16, 2025 Pacific Standard TimeUTC -08:00 Los Angeles San Francisco Las Vegas Seattle |
| Mountain Time | Central Time | Eastern Time |
1:24:55 PMSunday, November 16, 2025 Mountain Standard TimeUTC -07:00 Denver Phoenix | 2:24:55 PMSunday, November 16, 2025 Central Standard TimeUTC -06:00 Chicago Houston Dallas | 3:24:55 PMSunday, November 16, 2025 Eastern Standard TimeUTC -05:00 New York Washington DC Atlanta |