Mountain Time Zone
From Wikipedia, the free encyclopedia
The Mountain Time Zone of North America keeps time by subtracting seven hours from Coordinated Universal Time (UTC-7) during the short days of autumn, winter and spring, and by subtracting six hours during the Daylight Saving days of spring, summer, and early autumn (UTC-6). The clock time in this zone is based on the mean solar time of the 105th degree meridian west of the Greenwich Observatory.
In the United States and Canada, this time zone is generically called Mountain Time (MT). Specifically, it is Mountain Standard Time (MST) when observing standard time (Winter), and Mountain Daylight Time (MDT) when observing daylight savings (Summer).
The zone is one hour ahead of the Pacific Time Zone and one hour behind the Central Time Zone.
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[edit] Canada
The following provinces and areas are part of the Mountain Time Zone:
- Alberta
- the Northwest Territories (except for Tungsten)
- the Kitikmeot Region of Nunavut
- portions of southeastern and northeastern British Columbia
- the area of Saskatchewan immediately surrounding the city of Lloydminster
[edit] Mexico
The following states are part of the time zone:
- Baja California Sur
- Chihuahua
- Nayarit
- Sinaloa
- Sonora - always on MST - no daylight savings time
[edit] United States
The following states or areas are part of the time zone:
- Arizona - always on MST - no daylight savings time except in Navajo reservation
- New Mexico
- Wyoming
- Utah
- Colorado
- Montana
- Idaho (except northern panhandle)
- Eastern Oregon/Malheur County
- the southwestern quadrant of North Dakota
- the western half of South Dakota
- the western third of Nebraska
- the two westernmost counties in Texas
- four counties in Kansas (Greeley, Hamilton, Sherman, and Wallace)
- the Nevada town of West Wendover
Jackpot, Nevada observes Mountain Time unofficially because of close economic ties with southern Idaho. Although officially on Mountain Time, Fort Pierre, South Dakota keeps Central Time because of its proximity to Pierre.
Arizona does not observe Daylight Saving Time. However, the Navajo Nation, the bulk of whose area is within Arizona, observes Daylight Saving Time throughout its territory.
[edit] Major metropolitan areas
- Albuquerque, New Mexico
- Billings, Montana
- Boise, Idaho
- Calgary, Alberta
- Chihuahua, Chihuahua
- Ciudad Juárez, Chihuahua
- Colorado Springs, Colorado
- Cranbrook, British Columbia
- Denver, Colorado
- Edmonton, Alberta
- El Paso, Texas
- Fort St. John, British Columbia (no DST)
- La Paz, Baja California Sur
- Phoenix, Arizona (no DST)
- Salt Lake City, Utah
- Tucson, Arizona (no DST)
[edit] See also
- Time zone
- Hawaii-Aleutian Time Zone
- Alaska Time Zone
- Pacific Time Zone
- Central Time Zone
- Eastern Time Zone
- Atlantic Standard Time Zone
- Newfoundland Standard Time Zone
