Mountain Standard Time (MST)
MST is UTC-7. Current Mountain Time (US & Canada) and when MST applies.
Mountain Time (US & Canada) now
--:--:--
Saturday, September 19, 2026
MDTUTC-6
Mountain Time is on MDT right now, not MST
Exact MST (UTC-7) time now: --:--:--
About MST
- Full Name
- Mountain Standard Time
- Abbreviation
- MST
- UTC Offset
- UTC-7
- Mountain Time is on
- Daylight Time (MDT)
- Daylight Saving Time
- Mountain Time: Ends Nov 1, 2026 · switches between MST and MDT
Mountain Standard Time (MST) is UTC-7. Denver, Salt Lake City, Alberta and most of the Mountain region use MST in winter and Mountain Daylight Time (MDT, UTC-6) in summer. Arizona (except the Navajo Nation), Sonora, several other Mexican states, Yukon and parts of British Columbia use UTC-7 all year, so in summer they match Pacific Daylight Time.
Where MST is used
Switches between MST and MDT
- Denver, Salt Lake City, Albuquerque, Boise and most of the Mountain West, United States
- Alberta, the Northwest Territories and southeastern British Columbia, Canada (Calgary, Edmonton, Yellowknife)Lloydminster, which straddles the Alberta–Saskatchewan border, also follows this time.
- Ciudad Juárez, Chihuahua, MexicoFollows US daylight saving dates.
MST all year (no DST)
- Arizona, United States, except the Navajo Nation
- Sonora, Mexico
- Sinaloa, Baja California Sur and most of Nayarit, MexicoThese states stopped changing clocks when Mexico ended daylight saving time in 2022.
- Yukon, Canada (Whitehorse, Dawson City)Yukon was on Pacific Time until 2020. It stopped changing clocks that year and now stays on UTC-7, often shown as “Yukon Time”.
- Northeastern British Columbia (Dawson Creek, Fort St. John, Fort Nelson) and Creston, Canada
Major Cities in Mountain Time and MST
Denver--:--MDTEdmonton--:--MDTAlbuquerque--:--MDTAurora--:--MDTBoise--:--MDTColorado Springs--:--MDTEl Paso--:--MDT
Phoenix--:--MSTMesa--:--MSTTucson--:--MSTEach city shows its own current abbreviation, so places on daylight saving time are labelled accordingly.
MST vs Other Time Zones
| Comparison | By definition | Right now (local clocks) |
|---|---|---|
| MST to PST | -1 hour | -1 hour |
| MST to CST | +1 hour | +1 hour |
| MST to EST | +2 hours | +2 hours |
| MST to IST | +12 hours 30 minutes | +11 hours 30 minutes |
| MST to UTC | +7 hours | +6 hours |
“By definition” compares the fixed offsets of the abbreviations. “Right now” compares the actual local time in each region today, including daylight saving time.
MST converters
- EST to MSTEastern Standard Time → Mountain Standard Time
- MST to ESTMountain Standard Time → Eastern Standard Time
- PST to MSTPacific Standard Time → Mountain Standard Time
- MST to PSTMountain Standard Time → Pacific Standard Time
- CST to MSTCentral Standard Time → Mountain Standard Time
- MST to CSTMountain Standard Time → Central Standard Time
MST FAQs
What is MST?
Mountain Standard Time (MST) is UTC-7. Denver, Salt Lake City, Alberta and most of the Mountain region use MST in winter and Mountain Daylight Time (MDT, UTC-6) in summer. Arizona (except the Navajo Nation), Sonora, several other Mexican states, Yukon and parts of British Columbia use UTC-7 all year, so in summer they match Pacific Daylight Time.
What is the UTC offset of MST?
MST is always UTC-7. When Mountain Time observes daylight saving time, it uses MDT (UTC-6) instead.
Is it MST or MDT right now?
Mountain Time is on MDT right now, not MST. MDT is UTC-6, 1 hour ahead of MST (UTC-7). Mountain Time returns to MST on Sunday, November 1, 2026 at 2:00 AM. Places that stay on MST all year, such as Phoenix, Mesa and Tucson, are on UTC-7 now.
When does Mountain Time switch between MST and MDT?
In 2026, Mountain Time switches to MDT on Sunday, March 8, 2026 at 2:00 AM (clocks go forward 1 hour) and back on Sunday, November 1, 2026 at 2:00 AM (clocks go back 1 hour).
Where is MST used all year?
These places use UTC-7 all year without daylight saving time: Arizona, United States, except the Navajo Nation; Sonora, Mexico; Sinaloa, Baja California Sur and most of Nayarit, Mexico; Yukon, Canada (Whitehorse, Dawson City); Northeastern British Columbia (Dawson Creek, Fort St. John, Fort Nelson) and Creston, Canada.