Mountain Time Zone - MT

Mountain Time is actually a blanket term used to describe the areas that observe either the Mountain Standard Time or Mountain Daylight Time.

Mountain Standard Time

Mountain Standard Time (MST) is seven hours behind the Coordinated Universal Time standard, written as an offset of UTC - 7:00. That means to find the standard time in the zone you must subtract seven hours from Coordinated Universal Time.

Mountain Daylight Time

Mountain Daylight Time (MDT) is six hours behind the Coordinated Universal Time standard, written as an offset of UTC - 6:00. That means to find the standard time in the zone you must subtract six hours from Coordinated Universal Time.

Territories observing these time zones are primarily in North America. They run through several U.S. and Mexican states, and Canadian provinces.

In many of the areas where this time zone is used, during fall to winter months Mountain Standard Time or MST is observed, and then during Daylight Saving (spring to summer months) Mountain Daylight Time or MDT is used.

Locations in Mountain Time Zone

The following areas are included in the time zone:

• North America

  • United States

    • Arizona

    • Colorado

    • Idaho

    • Kansas

    • Montana

    • Nebraska

    • New Mexico

    • North Dakota

    • Oregon

    • South Dakota

    • Texas

    • Utah

    • Wyoming

  • Canada

    • Alberta

    • British Columbia

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    • Northwest Territories

    • Nunavut

    • Saskatchewan

  • Mexico

    • Baja California

    • Chihuahua

    • Nayarit

    • Sinaloa

    • Sonora

Also known as: Mountain Time (MT) and Mountain Daylight Time (MDT)

Currently observing MST – Mountain Standard Time.

Currently has same time zone offset as MST (UTC -7) but different time zone name.

Mountain Standard Time (MST) is 7 hours behind Coordinated Universal Time (UTC). This time zone is in use during standard time in: North America.

See full time zone map

What Is Mountain Standard Time?

Mountain Standard Time is the second westernmost time zone in the United States and Canada. It is also used in Mexico.

It covers all or parts of 13 states in the US and five provinces or territories in Canada.

The MST time zone is the least populated time zone in the USA. It spans from northern Canada to Mexico near the equator.

In North America, Mountain Standard Time shares a border with Central Standard Time (CST) in the east and with Pacific Standard Time (PST) in the west.

Mountain Standard Time Zone

Mountain Standard Time (MST) is a standard time zone in use from the first Sunday in November to the second Sunday in March—when Daylight Saving Time (DST) is not in effect. Mountain Daylight Time (MDT) is used during the remainder of the year.

Some areas in British Coloumbia, including Creston, Fort Nelson, Fort St. John, and Dawson Creek use Mountain Standard Time all year.

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:

• PDT – Pacific Daylight Time
• T – Tango Time Zone