MST — Mountain Standard Time
UTC-7 / MDT during DST
Current MST Time
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America/Denver
Mountain Standard Time (MST) is 7 hours behind Coordinated Universal Time (UTC-7). It covers the mountain region of the United States and Canada. Arizona does not observe DST and stays on MST year-round. Other areas switch to Mountain Daylight Time (MDT, UTC-6).
MST Key Facts
- Full name: Mountain Standard Time
- Abbreviation: MST
- UTC offset: UTC-7
- DST: Switches to MDT (UTC-6) during summer
- IANA identifier: America/Denver
- Countries: United States, Canada
- Major cities: Denver, Phoenix, Calgary, Edmonton, Salt Lake City
Understanding MST
Mountain Standard Time (MST) uses a UTC offset of UTC-7, placing it 7 hours behind UTC. During Daylight Saving Time, the region shifts to MDT (UTC-6), moving clocks forward by one hour.
MST is observed across 2 countries, including United States, Canada. Major metropolitan areas in this time zone include Denver, Phoenix, Calgary, Edmonton, Salt Lake City, making it one of the most commercially active time zones in the world.
Frequently Asked Questions
What is MST time?
MST stands for Mountain Standard Time. It is UTC-7, meaning it is 7 hours behind Coordinated Universal Time (UTC).
What countries use MST?
MST (Mountain Standard Time) is used in United States, Canada. Major cities in this timezone include Denver, Phoenix, Calgary.
Does MST observe Daylight Saving Time?
Yes, MST observes Daylight Saving Time. During DST, clocks move forward by 1 hour to MDT (UTC-6). The exact dates vary by country.
What is the UTC offset for MST?
MST has a UTC offset of UTC-7. During Daylight Saving Time, it shifts to MDT with a UTC offset of UTC-6. The IANA time zone identifier is America/Denver.
What is MST in military time?
In the military time zone system, MST (UTC-7) is designated with a specific letter code. Military time zones use letters A through Z (excluding J) to represent offsets from UTC.