How many time zones does the United States span?

The United States spans 6 standard domestic time zones across its 50 states: Eastern (ET), Central (CT), Mountain (MT), Pacific (PT), Alaska (AKT), and Hawaii-Aleutian (HAT). Adding overseas territories brings the national total to 9 official civil time zones.

Which US states do not observe Daylight Saving Time?

Hawaii and the majority of Arizona (excluding the Navajo Nation) remain on standard time year-round, opting out under the federal Uniform Time Act.

How many time zones does the United States span?

The United States spans 6 standard domestic time zones across its 50 states: Eastern (ET), Central (CT), Mountain (MT), Pacific (PT), Alaska (AKT), and Hawaii-Aleutian (HAT). Adding overseas territories brings the national total to 9 official civil time zones.

Which US states do not observe Daylight Saving Time?

Hawaii and the majority of Arizona (excluding the Navajo Nation) remain on standard time year-round, opting out under the federal Uniform Time Act.

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Current Local Time Across the United States

What time is it in the US right now? Live atomic clocks for Washington, D.C. and major cities, 6 primary time zones, UTC offsets, and daylight saving status.

Capital Time (Washington, D.C.)15:52:02UTC -4

Looking for live clocks across all US time zones?View real-time atomic clocks for Eastern, Central, Mountain, Pacific, Alaska, and Hawaii.

US Time Now Hub →

Daylight Saving Rule: Observes Daylight Saving Time across most states from second Sunday in March to first Sunday in November (Arizona and Hawaii excluded).

Major Cities in United States

New YorkAmerica/New_York

15:52UTC -4

Los AngelesAmerica/Los_Angeles

12:52UTC -7

ChicagoAmerica/Chicago

14:52UTC -5

San FranciscoAmerica/Los_Angeles

12:52UTC -7

HoustonAmerica/Chicago

14:52UTC -5

PhoenixAmerica/Phoenix

12:52UTC -7

DallasAmerica/Chicago

14:52UTC -5

AustinAmerica/Chicago

14:52UTC -5

San DiegoAmerica/Los_Angeles

12:52UTC -7

SeattleAmerica/Los_Angeles

12:52UTC -7

DenverAmerica/Denver

13:52UTC -6

BostonAmerica/New_York

15:52UTC -4

Las VegasAmerica/Los_Angeles

12:52UTC -7

El PasoAmerica/Denver

13:52UTC -6

AlbuquerqueAmerica/Denver

13:52UTC -6

TucsonAmerica/Phoenix

12:52UTC -7

MesaAmerica/Phoenix

12:52UTC -7

AtlantaAmerica/New_York

15:52UTC -4

MiamiAmerica/New_York

15:52UTC -4

MinneapolisAmerica/Chicago

14:52UTC -5

HonoluluPacific/Honolulu

09:52UTC -10

AnchorageAmerica/Anchorage

11:52UTC -8

ScottsdaleAmerica/Phoenix

12:52UTC -7

BoiseAmerica/Boise

13:52UTC -6

Salt Lake CityAmerica/Denver

13:52UTC -6

FlagstaffAmerica/Phoenix

12:52UTC -7

HiloPacific/Honolulu

09:52UTC -10

FairbanksAmerica/Anchorage

11:52UTC -8

JuneauAmerica/Juneau

11:52UTC -8

KahuluiPacific/Honolulu

09:52UTC -10

Washington D.C.America/New_York

15:52UTC -4

Need specific city time and local schedules in United States?Browse All United States Cities

National Chronometry & Time Zones

Capital Clock: Washington, D.C. and Eastern Time

Check exact civil time across the United States with verified atomic accuracy. Spanning more than 2,800 miles across the continent plus Alaska and Hawaii, the US operates across six primary time zones.

Our interactive national directory provides real-time clocks for every zone, tracks Wall Street financial trading hours, and simplifies cross-country scheduling between the Atlantic and Pacific coasts.

The 6 Primary Continental and Island Time Zones

National timekeeping policies, statutory observances, and regional time zone distribution in United States.

Federal Daylight Saving Time Rules and State Exceptions

National timekeeping policies, statutory observances, and regional time zone distribution in United States.

Frequently Asked Questions About United States

Common queries, time calculations, and scientific explanations

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The capital of the United States is Washington, D.C., operating in the Eastern Time Zone (EST/EDT). View the live atomic clock for Washington, D.C. above.