MST – Mountain Standard Time (Time Zone Abbreviation)

Also known as: MT – Mountain Time, NAMST – North American Mountain Standard Time

Caution: This is NOT the current local time in most locations in that time zone

North America: Only some locations are currently on MST because most places in this time zone are currently on summer time / daylight saving time and are observing MDT.

Time zone map of MST — Currently observing MST.
Observes MST part of the year.
Areas with same time currently (UTC -7).
Currently observing MST – Mountain Standard Time.
Observes MST – Mountain Standard Time part of the year, but not currently.
Currently has same time zone offset as MST (UTC -7) but different time zone name.

Mountain Standard Time (MST) is 7 hours behind Coordinated Universal Time (UTC). This time zone is in use during standard time in: North America.

See full time zone map

Where and When is MST Observed?

North America

U.S. states using MST in the winter and MDT in the summer:

Arizona - Navajo Nation only
Colorado
Idaho - most of the state except western counties Show
Benewah, Bonner, Boundary, Clearwater, Kootenai, Latah, Lewis, Nez Perce, Shoshone and north part of Idaho
Kansas - some western counties only Show
Greeley, Hamilton, Sherman and Wallace
Montana
Nebraska - western counties Show
Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes, Deuel, Dundy, Garden, Grant, Hooker, Keith, Kimball, Morrill, Perkins, Scotts Bluff, Sheridan, and Sioux and the western part of Cherry
New Mexico
North Dakota - South-Western parts Show
counties of Adams, Billings, Bowman, Golden Valley, Grant, Hettinger, Mercer, Slope and Stark, and southern parts of Dunn and McKenzie, most of Morton and Sioux counties
Oregon - parts of Malheur county only Show
rest of Oregon is PST/PDT
South Dakota - western counties Show
Bennett, Butte, Corson, Custer, Dewey, Fall River, Haakon, Harding, Jackson, Lawrence, Meade, Pennington, Perkins, Shannon, and Ziebach, and the western parts of Stanley
Texas - a few counties in west Show
El Paso and Hudspeth and part of Culberson
Utah
Wyoming

Canadian provinces/territories using MST in the winter and MDT in the summer:

Alberta
British Columbia - a few eastern communities Show
Cranbrook, Golden, Invermere
Northwest Territories
Nunavut - Kugluktuk, Cambridge Bay only (Other parts use EST/EDT or EST only)
Saskatchewan - only Lloydminster

Mexican states using MST in the winter and MDT in the summer:

Mexican states using MST all year:

Sonora

U.S. states using MST all year:

Arizona Show
except Navajo Nation

Canadian provinces/territories using MST all year:

Some locations in British Columbia Show
Creston, the Northern Rockies Regional Municipality, and most of Peace River Regional District (except Fort Ware)

Other Time Zones in UTC -7

Some time zones exist that have the same offset as MST, but can be found under a different name: