What Is MST Time?


Quick Answer

MST time refers to Mountain Standard Time, which is a time zone used in North America. Mountain Standard Time is seven hours behind Greenwich Mean Time and Coordinated Universal Time.

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Full Answer

MST is one of the nine standard time zones in the United States, occurring in Utah, Colorado, Montana, Wyoming, New Mexico, and parts of Idaho and Oregon. It is also used by several provinces in Canada and Mexico. In the United States and Canada, MST is used when standard time is observed in fall and winter. In spring and summer, daylight saving time is observed instead; thus, Mountain Daylight Time (MDT). MDT is one hour ahead of MST. Two areas of particular exception are Sonora in Mexico and Arizona in the United States.

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