The United States spans 6 time zones, from Eastern Time (UTC-5) on the East Coast to Hawaii-Aleutian Time (UTC-10) in the Pacific. Most of the country observes daylight saving time from March to November, except Arizona and Hawaii.
| Time Zone | Standard | Daylight | Major States |
|---|---|---|---|
| Eastern Time (ET) | EST (UTC-5) | EDT (UTC-4) | New York, Florida, Georgia, Pennsylvania, Ohio, Michigan, North Carolina, Massachusetts, and more |
| Central Time (CT) | CST (UTC-6) | CDT (UTC-5) | Texas, Illinois, Minnesota, Wisconsin, Iowa, Missouri, Louisiana, and more |
| Mountain Time (MT) | MST (UTC-7) | MDT (UTC-6) | Colorado, Utah, Montana, New Mexico, Wyoming, and more |
| Pacific Time (PT) | PST (UTC-8) | PDT (UTC-7) | California, Washington, Oregon, Nevada |
| Alaska Time (AKT) | AKST (UTC-9) | AKDT (UTC-8) | Alaska (most of the state) |
| Hawaii-Aleutian (HAT) | HST (UTC-10) | N/A (no DST) | Hawaii, Aleutian Islands (western Alaska) |
Most US states observe daylight saving time (DST). Clocks spring forward by one hour on the second Sunday of March and fall back on the first Sunday of November. During DST, the effective UTC offset shifts by +1 hour (e.g., Eastern moves from UTC-5 to UTC-4).
Exceptions:
Click any state for detailed time zone information, major cities, and DST status.
The US has 6 time zones: Eastern, Central, Mountain, Pacific, Alaska, and Hawaii-Aleutian. When including US territories (Guam, Puerto Rico, US Virgin Islands, American Samoa), the total reaches 9.
No. Arizona (except the Navajo Nation) and Hawaii do not observe DST. US territories including Puerto Rico, Guam, American Samoa, and the US Virgin Islands also stay on standard time year-round.
The East Coast (Eastern Time) is 3 hours ahead of the West Coast (Pacific Time). When it is 12:00 noon in New York, it is 9:00 AM in Los Angeles. See the full New York vs Los Angeles comparison.