Mountain Time Zone
The Mountain Time Zone uses MST (UTC−7) in winter and MDT (UTC−6) from the second Sunday in March to the first Sunday in November. Most of Arizona stays on MST (UTC−7) all year. Denver, Phoenix, Salt Lake City, Albuquerque, El Paso, Boise and Billings are on Mountain time. Phoenix and most of Arizona don't change their clocks.
| Abbreviations | MST / MDT |
|---|---|
| UTC offset | UTC−7 / UTC−6 in summer |
| Reference zone | America/Denver |
| Military letter | T (Tango) |
States in the Mountain Time Zone
Split states mostly in this zone
- Arizona, except the Navajo Nation in the northeast, which does use daylight saving time
- Idaho, except the northern Panhandle, north of the Salmon River (Coeur d'Alene, Moscow, Lewiston)
Parts of other states
- Arizona: the Navajo Nation in the northeast, which does use daylight saving time
- Kansas: four western counties on the Colorado border (Greeley, Hamilton, Sherman, Wallace)
- Nebraska: the western Panhandle (Scottsbluff, Alliance, Sidney)
- Nevada: the city of West Wendover on the Utah border, officially, and Jackpot, unofficially
- North Dakota: the southwest, roughly south and west of the Missouri River (Dickinson, Bowman)
- Oregon: most of Malheur County on the Idaho border (Ontario, Vale)
- South Dakota: the western half of the state (Rapid City, the Black Hills, Mount Rushmore)
- Texas: El Paso and Hudspeth counties in far West Texas
Major cities
| City | State |
|---|---|
| Phoenix | Arizona |
| Tucson | Arizona |
| Flagstaff | Arizona |
| Window Rock (Navajo Nation) | Arizona |
| Denver | Colorado |
| Colorado Springs | Colorado |
| Aurora | Colorado |
| Boise | Idaho |
| Idaho Falls | Idaho |
| Pocatello | Idaho |
| Goodland | Kansas |
| Billings | Montana |
| Missoula | Montana |
| Helena | Montana |
| Bozeman | Montana |
| Scottsbluff | Nebraska |
| West Wendover | Nevada |
| Albuquerque | New Mexico |
| Santa Fe | New Mexico |
| Las Cruces | New Mexico |
| Dickinson | North Dakota |
| Ontario | Oregon |
| Rapid City | South Dakota |
| El Paso | Texas |
Mountain time in other US zones
Standard time; the gaps are the same in summer, except for Arizona and Hawaii.
| MST | Eastern | Central | Mountain | Pacific | Alaska | Hawaii–Aleutian |
|---|---|---|---|---|---|---|
| 6 AM | 8 AM | 7 AM | 6 AM | 5 AM | 4 AM | 3 AM |
| 9 AM | 11 AM | 10 AM | 9 AM | 8 AM | 7 AM | 6 AM |
| 12 PM | 2 PM | 1 PM | 12 PM | 11 AM | 10 AM | 9 AM |
| 3 PM | 5 PM | 4 PM | 3 PM | 2 PM | 1 PM | 12 PM |
| 6 PM | 8 PM | 7 PM | 6 PM | 5 PM | 4 PM | 3 PM |
| 9 PM | 11 PM | 10 PM | 9 PM | 8 PM | 7 PM | 6 PM |
Outside the US
British Columbia and Yukon now stay on UTC−7 all year. In Mexico, Sonora and Baja California Sur use UTC−7 all year, and Ciudad Juárez follows US Mountain time.
Questions people ask
What states are in the Mountain Time Zone?
7 states and territories use Mountain Time as their main time, and 8 more have parts in it. They're all listed above.
Is it MST or MDT right now?
From the second Sunday in March to the first Sunday in November it's MDT (UTC−6); the rest of the year it's MST (UTC−7). The live clock at the top shows which applies today.
What is Mountain Time in UTC?
UTC−7 in winter and UTC−6 in summer.
See all US time zones on the map · time zone converter