MT time now |
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03:54:33 Mon, 4 Aug 2025
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| UTC Offset: UTC -6 |
Mountain Time (MT) is a time zone primarily used in parts of the United States, Canada, and Mexico. It operates on Mountain Standard Time (MST) at UTC−7 during the fall and winter months, and transitions to Mountain Daylight Time (MDT) at UTC−6 during daylight saving time in the spring and summer. Major cities in this time zone include Denver, Phoenix (which remains on MST year-round), Calgary, and Ciudad Juárez.
Importance and Global Use of Mountain Time
Mountain Time plays a key role in regional coordination across the central-western areas of North America. It bridges the gap between Central Time and Pacific Time, supporting interstate commerce, transport, broadcasting, and public services in a vast geographical area. The time zone accommodates both areas that observe daylight saving time and those that do not, making it unique in its application.
In civilian and business settings, MT is crucial for scheduling across industries, especially in energy, agriculture, and federal operations. It supports regional cooperation between U.S. states and Canadian provinces, and its wide use ensures synchronization across cross-border communications, transportation networks, and economic activities.
Where and When MT is used worldwide
Operating on the same time (UTC -6).
North America
US states using MST during winter and MDT during summer:
- Arizona - Navajo Nation only InfoRest of the state follow MST all year.
- Colorado
- Idaho - all except northern counties InfoAll except Benewah, Bonner, Boundary, Clearwater, Kootenai, Latah, Lewis, Nez Perce, Shoshone, and north part of Idaho observe PST/PDT time zones.
- Kansas - few western counties onlyInfoGreeley, Hamilton, Sherman and Wallace
- Montana
- Nebraska - western counties InfoCounties are: Arthur, Banner, Box Butte, Chase, Cherry (west part), Cheyenne, Dawes, Deuel, Dundy, Garden, Grant, Hooker, Keith, Kimball, Morrill, Perkins, Scotts Bluff, Sheridan, and Sioux counties of Nebraska.
- New Mexico
- North Dakota - southwest counties only InfoThese southwest counties are: Adams, Billings, Bowman, Dunn (most), Golden Valley, Grant, Hettinger, McKenzie (south part), Mercer, Morton (most), Sioux (most), Slope, and Stark.
- Oregon - most of Malheur County only InfoRest of the state observe PST/PDT time zones.
- South Dakota - western counties only InfoWestern counties are: Bennett, Butte, Corson, Custer, Dewey, Fall River, Haakon, Harding, Jackson, Jones (west part), Lawrence, Meade, Mellette, Pennington, Perkins, Shannon, Stanley (west part), Todd, and Ziebach.
- Texas - few western counties only InfoEl Paso, Hudspeth, and most part of Culberson counties
- Utah
- Wyoming
Canadian provinces and territories using MST during winter and MDT during summer:
- Alberta
- British Columbia - some southeastern communities Info Some southeastern communities near the Alberta border (including Cranbrook and Fernie).
- Northwest Territories - all except the community of Tungsten InfoThe community of Tungsten observe PST/PDT time zones.
- Nunavut - west of 102° West and all communities in the Kitikmeot Region
- Saskatchewan - Lloydminster and surrounding area only
Mexican states using MST during winter and MDT during summer:
- Chihuahua - northwest border area only Infonortheast border area observe CST/CDT time zones and rest of the state use CST year-around.
US states using using MST all year:
Canadian provinces and territories using MST all year:
- British Columbia - some eastern and southeastern communities InfoPeace River Regional District (including Dawson Creek and Fort St. John) and Creston area.
- Yukon