Mountain Standard Time

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

Mountain Standard Time (MST) is UTC-7:00, and Mountain Daylight Time (MDT) is UTC-6:00, this time zone is called Mountain Time (MT) in the United States and Canada. Eastern Standard Time (EST) is UTC-5:00, and Eastern Daylight Time (EDT) is UTC-4:00, this time zone is called Eastern Time Zone (ET) in the United States, parts of eastern Canada.

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.

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.

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:

• 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

• 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

• 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

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

• British Columbia - a few eastern communities Show

  Cranbrook, Golden, Invermere

• Nunavut - Kugluktuk, Cambridge Bay only (Other parts use EST/EDT or EST only)

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

Mexican states using MST all year:

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: