Mountain Standard Time Zone

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This article is for time zone on Earth, for Martian Standard Time for planet Mars, see Martian Standard Time
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MST is -7

The Mountain Standard Time Zone (MST) is a geographic region that keeps time by subtracting seven hours from Coordinated Universal Time (UTC). In the United States, the following states are part of the Mountain Standard Time Zone:

Additionally, the southwestern quadrant of North Dakota, the western half of South Dakota, the western third of Nebraska, the two westernmost counties in Texas, and the bulk of Idaho are part of the Mountain Standard Time Zone. Four counties in Kansas are part of the Mountain Standard Time Zone. Also, one county in Oregon is divided between the Mountain and Pacific Time Zones; most of the county in question (Malheur County) observes Mountain Time because of its economic ties to southwestern Idaho. Likewise, the Nevada towns of West Wendover and Jackpot observe Mountain Time because of close economic ties with central Utah and southern Idaho respectively.

Arizona is part of the Mountain Standard Time Zone, but does not observe Daylight Saving Time, a period of time between April and October in which the Mountain Standard Time Zone keeps time by subtracting six hours from UTC. However, the Navajo Nation, the bulk of whose area is within Arizona, observes Daylight Saving Time throughout its territory.

Other parts of the world that keep time by subtracting seven hours from UTC include the Canadian provinces of Alberta, Northwest Territories, and the part of Saskatchewan immediately surrounding Lloydminster; the Mexican states of Baja California Sur, Chihuahua, Nayarit, and Sinaloa, and Sonora, which does not practice DST.

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