U.S. Time Zone Map
Official U.S. standard time zone boundaries from the U.S. Department of Transportation (NTAD), paired with live local clocks for all 50 states, D.C., and U.S. territories, plus Daylight Saving Time exceptions.
Open full-resolution SVG map Check what time zone I am in right now Time difference calculator Sunrise & sunset times
Live Clocks Across the 50 U.S. States
All 9 U.S. Statutory Time Zones & Territory Offsets
| Time Zone & IANA ID | Current Time | Abbrev & Offset | Coverage & Daylight Saving Rule |
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How Official U.S. Time Zone Boundaries Are Defined
Standard time zones across the United States and its territories are established by federal law under the Uniform Time Act of 1966 and codified by the U.S. Department of Transportation (DOT) in Title 49 of the Code of Federal Regulations, Part 71 (49 CFR Part 71). The interactive SVG map above is rendered directly from the U.S. DOT Bureau of Transportation Statistics National Transportation Atlas Database (NTAD) World Time Zones dataset combined with U.S. Census Bureau state boundaries.
The 9 Statutory U.S. Time Zones From East to West
Across all 50 states, the District of Columbia, and inhabited U.S. territories, federal law defines nine standard time zones: Atlantic Standard Time (UTC−04:00, Puerto Rico and the U.S. Virgin Islands), Eastern Time (UTC−05:00 / −04:00 DST), Central Time (UTC−06:00 / −05:00 DST), Mountain Time (UTC−07:00 / −06:00 DST), Pacific Time (UTC−08:00 / −07:00 DST), Alaska Time (UTC−09:00 / −08:00 DST), Hawaii-Aleutian Time (UTC−10:00, with DST UTC−09:00 in the western Aleutians), Samoa Standard Time (UTC−11:00, American Samoa), and Chamorro Standard Time (UTC+10:00, Guam and the Northern Mariana Islands).
Areas in the United States That Do Not Observe Daylight Saving Time
- Arizona (except the Navajo Nation Reservation): Stays on Mountain Standard Time (
America/Phoenix, UTC−07:00) all year. From March to November, Phoenix shares the same clock reading as Los Angeles on Pacific Daylight Time (PDT). The Navajo Nation Reservation in northeastern Arizona does observe Daylight Saving Time (America/Denver), while the Hopi Reservation surrounded by it remains on year-round MST. - Hawaii: Stays on Hawaii Standard Time (
Pacific/Honolulu, UTC−10:00) all year. By contrast, the western Aleutian Islands of Alaska (west of 169°30′W) share the same standard offset but observe Daylight Saving Time (America/Adak, UTC−10:00 / −09:00). - U.S. Territories: Puerto Rico, the U.S. Virgin Islands, American Samoa, Guam, and the Northern Mariana Islands remain on standard time year-round.
13 U.S. States Split Between Two Time Zones
Thirteen states span two statutory time zones along county or geographic lines: Florida, Indiana, Kentucky, Michigan, and Tennessee (Eastern / Central); Kansas, Nebraska, North Dakota, South Dakota, and Texas (Central / Mountain); Idaho and Oregon (Mountain / Pacific); and Alaska (Alaska / Hawaii-Aleutian). Check your exact local zone on What Time Zone Am I In? or compare two zones on the Time Difference Calculator.