US time zones
Every US time zone with the time right now, a map of which states use which zone, and all the states that are split between two.
| Zone | Abbreviation and offset | Time now | States/territories |
|---|---|---|---|
| Eastern Time | EST, UTC−5 / EDT, UTC−4 | 22 | |
| Central Time | CST, UTC−6 / CDT, UTC−5 | 16 | |
| Mountain Time | MST, UTC−7 / MDT, UTC−6 | 6 | |
| Mountain Standard Time (no DST) | MST, UTC−7 | 1 | |
| Pacific Time | PST, UTC−8 / PDT, UTC−7 | 4 | |
| Alaska Time | AKST, UTC−9 / AKDT, UTC−8 | 1 | |
| Hawaii–Aleutian Time | HST, UTC−10 / HDT, UTC−9 | 1 | |
| Atlantic Standard Time | AST, UTC−4 | 2 | |
| Chamorro Standard Time | ChST, UTC+10 | 2 | |
| Samoa Standard Time | SST, UTC−11 | 1 |
US time zone map
Striped states are split between two zones. Click any state for details.
States split between two time zones
| State | Main zone | Other zone and area |
|---|---|---|
| Alaska | Alaska Time | Hawaii–Aleutian Time: the western Aleutian Islands, west of about 169.5° W (Adak, Atka) |
| Arizona | Mountain Standard Time (no DST) | Mountain Time: the Navajo Nation in the northeast, which does use daylight saving time |
| Florida | Eastern Time | Central Time: the western Panhandle, west of the Apalachicola River (Pensacola, Panama City, Destin) |
| Idaho | Mountain Time | Pacific Time: the northern Panhandle, north of the Salmon River (Coeur d'Alene, Moscow, Lewiston) |
| Indiana | Eastern Time | Central Time: 12 counties: six in the northwest near Chicago (Jasper, Lake, LaPorte, Newton, Porter, Starke) and six in the southwest near Evansville (Gibson, Perry, Posey, Spencer, Vanderburgh, Warrick) |
| Kansas | Central Time | Mountain Time: four western counties on the Colorado border (Greeley, Hamilton, Sherman, Wallace) |
| Kentucky | Eastern Time | Central Time: the western half of the state (Bowling Green, Paducah, Owensboro) |
| Michigan | Eastern Time | Central Time: four Upper Peninsula counties on the Wisconsin border (Gogebic, Iron, Dickinson, Menominee) |
| Nebraska | Central Time | Mountain Time: the western Panhandle (Scottsbluff, Alliance, Sidney) |
| Nevada | Pacific Time | Mountain Time: the city of West Wendover on the Utah border, officially, and Jackpot, unofficially |
| North Dakota | Central Time | Mountain Time: the southwest, roughly south and west of the Missouri River (Dickinson, Bowman) |
| Oregon | Pacific Time | Mountain Time: most of Malheur County on the Idaho border (Ontario, Vale) |
| South Dakota | Central Time | Mountain Time: the western half of the state (Rapid City, the Black Hills, Mount Rushmore) |
| Tennessee | Central Time | Eastern Time: East Tennessee (Knoxville, Chattanooga, Johnson City, Bristol) |
| Texas | Central Time | Mountain Time: El Paso and Hudspeth counties in far West Texas |
What time zone is each state in?
- AlabamaCentral Time
- AlaskaAlaska Time + Hawaii–Aleutian Time
- ArizonaMountain Standard Time (no DST) + Mountain Time
- ArkansasCentral Time
- CaliforniaPacific Time
- ColoradoMountain Time
- ConnecticutEastern Time
- DelawareEastern Time
- District of ColumbiaEastern Time
- FloridaEastern Time + Central Time
- GeorgiaEastern Time
- HawaiiHawaii–Aleutian Time
- IdahoMountain Time + Pacific Time
- IllinoisCentral Time
- IndianaEastern Time + Central Time
- IowaCentral Time
- KansasCentral Time + Mountain Time
- KentuckyEastern Time + Central Time
- LouisianaCentral Time
- MaineEastern Time
- MarylandEastern Time
- MassachusettsEastern Time
- MichiganEastern Time + Central Time
- MinnesotaCentral Time
- MississippiCentral Time
- MissouriCentral Time
- MontanaMountain Time
- NebraskaCentral Time + Mountain Time
- NevadaPacific Time + Mountain Time
- New HampshireEastern Time
- New JerseyEastern Time
- New MexicoMountain Time
- New YorkEastern Time
- North CarolinaEastern Time
- North DakotaCentral Time + Mountain Time
- OhioEastern Time
- OklahomaCentral Time
- OregonPacific Time + Mountain Time
- PennsylvaniaEastern Time
- Rhode IslandEastern Time
- South CarolinaEastern Time
- South DakotaCentral Time + Mountain Time
- TennesseeCentral Time + Eastern Time
- TexasCentral Time + Mountain Time
- UtahMountain Time
- VermontEastern Time
- VirginiaEastern Time
- WashingtonPacific Time
- West VirginiaEastern Time
- WisconsinCentral Time
- WyomingMountain Time
US territories
- Puerto RicoAtlantic Standard Time
- U.S. Virgin IslandsAtlantic Standard Time
- GuamChamorro Standard Time
- Northern Mariana IslandsChamorro Standard Time
- American SamoaSamoa Standard Time
A short history
US railroads created the first standard zones on November 18, 1883, and Congress made them law in the Standard Time Act of 1918, which also brought the first daylight saving time. The Uniform Time Act of 1966 set national daylight saving rules but let states opt out, which is why Arizona and Hawaii don't change their clocks. The current March-to-November schedule dates from 2007. Read the full story in railway time and the 1884 conference.
Questions people ask
How many time zones does the US have?
Six cover the 50 states: Eastern, Central, Mountain, Pacific, Alaska and Hawaii–Aleutian. Counting territories there are nine, adding Atlantic (Puerto Rico, U.S. Virgin Islands), Chamorro (Guam, Northern Mariana Islands) and Samoa (American Samoa).
Which states have two time zones?
14 states are split between two different time zones: Alaska, Florida, Idaho, Indiana, Kansas, Kentucky, Michigan, Nebraska, Nevada, North Dakota, Oregon, South Dakota, Tennessee, Texas. Arizona is also split in summer, because the Navajo Nation uses daylight saving time and the rest of the state doesn't.
Which states don't use daylight saving time?
Hawaii and most of Arizona. Puerto Rico, the U.S. Virgin Islands, Guam, the Northern Mariana Islands and American Samoa don't either.
What is the time difference between the East and West coasts?
Three hours. When it's noon in New York it's 9 AM in Los Angeles.
See also: daylight saving time dates · US zones in the IANA database · EST to PST converter