Home   Time Zones   Abbreviations   MST – Mountain Standard Time

MST – Mountain Standard Time / Mountain Time (Standard Time)

Time Zone names, codes and abbreviations for Standard Time and Daylight Saving Time (DST) around the world.

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.

Please use the search field on the right to find the correct local time in any city.

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.

This time zone is often called Mountain Time Zone.

See full time zone map

Summer Time & DST

Some places observe daylight saving time/summer time during the summer, and therefore use MDT (Mountain Daylight Time) in the summer.

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:

  • Baja California Sur
  • Chihuahua
  • Nayarit
  • Sinaloa

Mexican states using MST all year:

  • Sonora

U.S. states using MST all year:

  • ArizonaShow

    except Navajo Nation

Canadian provinces/territories using MST all year:

  • Some locations in British ColumbiaShow

    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: