Also known as: Mountain Time (MT) and Mountain Daylight Time (MDT)
Areas with same time currently (UTC -7).
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.
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.
MST Is the Mountain Time Zone
In everyday usage, MST is often referred to as Mountain Time (MT) or the Mountain Time Zone. This can add a bit of confusion as the term Mountain Time does not differentiate between standard time and Daylight Saving Time, so Mountain Time switches between MST and MDT in areas that use DST during part of the year.
Most North American time zones also have generic terms, including Pacific Time (PT), Central Time (CT), Eastern Time (ET), and Atlantic Time (AT).
Converting Mountain Time to Other US Time Zones
- Mountain Standard Time (MST) is 2 hours behind Eastern Standard Time (EST).
To convert MST to EST, you have to add two hours. - Mountain Standard Time (MST) is 1 hour behind Central Standard Time (CST).
To convert MST to CST, you have to add one hour. - Mountain Standard Time (MST) is 1 hour ahead of Pacific Standard Time (PST).
To convert MST to PST, you have to subtract one hour.
Time Zone Converter: UTC to MST
Where and When is MST Observed?
North America
US states using MST in the winter and MDT in the summer:
- Arizona - Navajo Nation only
- Colorado
- Idaho - most of the state except western counties
- Kansas - some western counties only
- Montana
- Nebraska - western counties
- New Mexico
- North Dakota - South-Western parts
- Oregon - parts of Malheur county only
- South Dakota - western counties
- Texas - a few counties in west
- Utah
- Wyoming
Canadian provinces/territories using MST in the winter and MDT in the summer:
- Alberta
- British Columbia - a few eastern communities
- Northwest Territories
- Nunavut - Kugluktuk, Cambridge Bay only (Other parts use EST/EDT or EST only)
- Saskatchewan - only Lloydminster
Mexican states using MST in the winter and MDT in the summer:
Mexican states using MST all year:
US states using MST all year:
Canadian provinces/territories using MST 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: