Which time zone each US state uses

The 50 states use six time zones. From east to west they are Eastern, Central, Mountain, Pacific, Alaska and Hawaii-Aleutian. Hawaii and most of Arizona stay on standard time all year. The rest of the country changes its clocks twice a year.

Updated 30 September 2026 · Time zone data 2026e · Sources

Every state and its time zone

Most states keep one time zone, and 14 are split between two. For a split state, the table shows where each zone applies and names cities on each side.

State	Time zone	Clocks change
Alabama	Central TimeCST	Yes
Alaska	Alaska TimeAKSTAll of Alaska except the western Aleutian IslandsIncludes Anchorage, Fairbanks and Juneau Hawaii-Aleutian TimeHSTThe Aleutian Islands west of 169.5 degrees westIncludes Adak	Yes
Arizona	Mountain TimeMSTAll of the state except the Navajo NationIncludes Phoenix and Tucson Mountain TimeMSTThe Navajo Nation	Only in the Navajo Nation
Arkansas	Central TimeCST	Yes
California	Pacific TimePST	Yes
Colorado	Mountain TimeMST	Yes
Connecticut	Eastern TimeEST	Yes
Delaware	Eastern TimeEST	Yes
District of Columbia	Eastern TimeEST	Yes
Florida	Eastern TimeESTMost of the stateIncludes Jacksonville, Miami, Tampa and Tallahassee Central TimeCSTThe western panhandle: Escambia, Santa Rosa, Okaloosa, Walton, Holmes, Washington, Bay, Jackson and Calhoun counties, and the northern part of Gulf CountyIncludes Pensacola and Panama City The line follows the Apalachicola River, then crosses Gulf County along the Jackson River and the Intracoastal Waterway.	Yes
Georgia	Eastern TimeEST	Yes
Hawaii	Hawaii-Aleutian TimeHST	No
Idaho	Mountain TimeMSTSouthern IdahoIncludes Boise, Idaho Falls and Pocatello Pacific TimePSTNorthern Idaho: Benewah, Bonner, Boundary, Clearwater, Kootenai, Latah, Lewis, Nez Perce and Shoshone counties, and Idaho County north of the Salmon RiverIncludes Coeur d'Alene, Lewiston and Moscow The line follows the Salmon River across Idaho County.	Yes
Illinois	Central TimeCST	Yes
Indiana	Eastern TimeESTMost of the stateIncludes Indianapolis, Fort Wayne and South Bend Central TimeCSTLake, Porter, LaPorte, Newton, Jasper and Starke counties in the northwest, and Gibson, Posey, Vanderburgh, Warrick, Spencer and Perry counties in the southwestIncludes Gary, Hammond and Evansville	Yes
Iowa	Central TimeCST	Yes
Kansas	Central TimeCSTAll of the state except four western countiesIncludes Wichita, Kansas City and Topeka Mountain TimeMSTSherman, Wallace, Greeley and Hamilton counties, on the Colorado borderIncludes Goodland	Yes
Kentucky	Eastern TimeESTThe east of the stateIncludes Louisville and Lexington Central TimeCSTThe west of the stateIncludes Bowling Green, Owensboro and Paducah The line runs along the edges of Meade, Hardin, Larue, Taylor, Casey, Pulaski and Wayne counties, which are on Eastern Time.	Yes
Louisiana	Central TimeCST	Yes
Maine	Eastern TimeEST	Yes
Maryland	Eastern TimeEST	Yes
Massachusetts	Eastern TimeEST	Yes
Michigan	Eastern TimeESTAll of the state except four counties in the Upper PeninsulaIncludes Detroit, Grand Rapids and Marquette Central TimeCSTGogebic, Iron, Dickinson and Menominee counties, on the Wisconsin borderIncludes Ironwood, Iron Mountain and Menominee	Yes
Minnesota	Central TimeCST	Yes
Mississippi	Central TimeCST	Yes
Missouri	Central TimeCST	Yes
Montana	Mountain TimeMST	Yes
Nebraska	Central TimeCSTThe east and center of the stateIncludes Omaha, Lincoln and North Platte Mountain TimeMSTThe west of the stateIncludes Scottsbluff, Alliance and Ogallala The line runs south through Cherry County, which is split, then along the western edges of Thomas, McPherson, Lincoln, Hayes and Hitchcock counties, which are on Central Time.	Yes
Nevada	Pacific TimePSTAll of the state except West WendoverIncludes Las Vegas and Reno Mountain TimeMSTThe city of West Wendover, on the Utah border	Yes
New Hampshire	Eastern TimeEST	Yes
New Jersey	Eastern TimeEST	Yes
New Mexico	Mountain TimeMST	Yes
New York	Eastern TimeEST	Yes
North Carolina	Eastern TimeEST	Yes
North Dakota	Central TimeCSTMost of the stateIncludes Fargo, Bismarck, Grand Forks and Minot Mountain TimeMSTThe southwest of the stateIncludes Dickinson and Bowman In the northwest the line follows rivers, mainly the Little Missouri and the Missouri. It then runs along the western edge of Mercer County and the southern edge of Morton County, both on Central Time. Sioux County is split along State Highway 31.	Yes
Ohio	Eastern TimeEST	Yes
Oklahoma	Central TimeCST	Yes
Oregon	Pacific TimePSTAll of the state except most of Malheur CountyIncludes Portland, Salem and Eugene Mountain TimeMSTMost of Malheur County, on the Idaho borderIncludes Ontario The southern part of Malheur County is on Pacific Time.	Yes
Pennsylvania	Eastern TimeEST	Yes
Rhode Island	Eastern TimeEST	Yes
South Carolina	Eastern TimeEST	Yes
South Dakota	Central TimeCSTThe east of the stateIncludes Sioux Falls and Aberdeen Mountain TimeMSTThe west of the stateIncludes Rapid City The line follows the Missouri River down to Pierre, then runs southwest to Jones County. From there it follows the western edges of Jones, Mellette and Todd counties, which are on Central Time.	Yes
Tennessee	Eastern TimeESTThe east of the stateIncludes Knoxville and Chattanooga Central TimeCSTThe rest of the stateIncludes Nashville and Memphis The line runs along the edges of Scott, Morgan, Roane, Rhea and Hamilton counties, which are on Eastern Time.	Yes
Texas	Central TimeCSTMost of the stateIncludes Houston, San Antonio, Dallas and Austin Mountain TimeMSTEl Paso and Hudspeth counties, in the far westIncludes El Paso	Yes
Utah	Mountain TimeMST	Yes
Vermont	Eastern TimeEST	Yes
Virginia	Eastern TimeEST	Yes
Washington	Pacific TimePST	Yes
West Virginia	Eastern TimeEST	Yes
Wisconsin	Central TimeCST	Yes
Wyoming	Mountain TimeMST	Yes

Places that do not change their clocks

Hawaii and most of Arizona stay on standard time all year. Arizona does so by state law. The territories in the table do not change their clocks either.

Place	Time all year
Arizona, except the Navajo Nation	MST, UTC-7
Hawaii	HST, UTC-10
Puerto Rico	AST, UTC-4
US Virgin Islands	AST, UTC-4
Guam	ChST, UTC+10
Northern Mariana Islands	ChST, UTC+10
American Samoa	SST, UTC-11

The Navajo Nation is the exception inside Arizona. It changes its clocks, to keep the same time as its communities in Utah and New Mexico.

The six US time zones

Each row gives a zone's standard and daylight time and the time there now. Arizona and the Aleutian Islands have rows of their own. Each shares a standard time with its neighbor but not its clock changes.

Time zone	Standard time	Daylight saving time	Time now
Eastern TimeNew York City, Philadelphia	EST, UTC-5	EDT, UTC-4	--:--
Central TimeChicago, Houston, San Antonio	CST, UTC-6	CDT, UTC-5	--:--
Mountain TimeDenver, El Paso, Albuquerque	MST, UTC-7	MDT, UTC-6	--:--
Mountain Time in ArizonaPhoenix, Tucson, Mesa	MST, UTC-7	Not observed	--:--
Pacific TimeLos Angeles, San Diego, San Jose	PST, UTC-8	PDT, UTC-7	--:--
Alaska TimeAnchorage, Fairbanks, Juneau	AKST, UTC-9	AKDT, UTC-8	--:--
Hawaii-Aleutian Time in HawaiiHonolulu, East Honolulu, Pearl City	HST, UTC-10	Not observed	--:--
Hawaii-Aleutian Time in the AleutiansAdak	HST, UTC-10	HDT, UTC-9	--:--

The times appear once the page has checked the server clock.

How many time zones does the US have?

Six zones cover the 50 states. The other answers you will see are not wrong. They count different things.

The contiguous states: 4time zones; The 48 states between Canada and Mexico use four zones: Eastern, Central, Mountain and Pacific.
All 50 states: 6time zones; Alaska and Hawaii-Aleutian time bring the count to six. This is the number this page uses.
Federal law: 9time zones; The law names nine. The extra three cover the territories: Atlantic, Samoa and Chamorro time.
The tz database: 29zone entries; The tz database, the list software uses to convert times, has 29 entries for the 50 states. Most of them record past differences, not present ones. Indiana alone has 8.

When the clocks change in the United States

Every place that changes its clocks does so on the same two days, at the same local time. The change reaches the east coast first and the Aleutian Islands last.

Clocks go back

Sunday 1 November 2026

2:00 AMto1:00 AM

Clocks go forward

Sunday 14 March 2027

2:00 AMto3:00 AM

Last change: On Sunday 8 March 2026 at 2:00 AM, clocks went forward one hour.

Daylight saving dates around the world

Questions about US time zones

What time zone is Phoenix in?

Phoenix is on Mountain Standard Time, MST, UTC-7, all year. Arizona does not change its clocks, so Phoenix keeps the same time as Denver in winter and the same time as Los Angeles in summer. The Navajo Nation, in the same state, does change its clocks.

Is Texas in one time zone?

No. Most of Texas, including Houston, San Antonio, Dallas and Austin, is on Central Time, CST, UTC-6 in winter. El Paso and Hudspeth counties in the far west are on Mountain Time, 1 hour behind the rest of the state. Both parts change their clocks on the same days, so the gap holds all year.

What time zone is Florida in?

Most of Florida is on Eastern Time, EST, UTC-5 in winter, including Jacksonville, Miami, Tampa and Tallahassee. The western panhandle is on Central Time, 1 hour behind the rest of the state. It lies west of the Apalachicola River and includes Pensacola and Panama City. Both parts change their clocks on the same days.

What time zone is Nashville in?

Nashville is on Central Time, CST, UTC-6 in winter, and so is Memphis. Tennessee is split between two zones. Knoxville, Chattanooga and the rest of the east are on Eastern Time, 1 hour ahead of Nashville. Both parts change their clocks on the same days, so the gap holds all year.

Why does Indiana have so many time zone entries?

Indiana's counties changed their clocks at different times over the years, and the tz database keeps a separate entry for each history. Today all of Indiana is on Eastern or Central Time, and every county changes its clocks on the same days. The extra entries matter to software, not to people planning a call.

Sources

We checked each fact on this page against these sources on 30 September 2026. Times, offsets and clock changes come from the time zone database.