MST — Mountain Standard Time
US & Canada Mountain
Wednesday, 12th August 2026
What MST actually is
UTC-7 in winter, UTC-6 (MDT) in summer.
Careful: US & Canada Mountain is not on MST at the moment. It is currently MDT (UTC-6) because of daylight saving.
MST means 2 different things
This is the whole reason calendar software uses IANA identifiers instead of abbreviations. All of them, live:
US & Canada Mountain
UTC-7 in winter, UTC-6 (MDT) in summer.
Clocks go back 1 hour on Sunday, 1st November 2026, at 1:59 am local time (1:00 am after the change).
Convert MST
Looking for UTC and GMT developer tooling — epoch conversion, ISO 8601, a free time API? That lives on our sibling site utctime.app.
Other abbreviations
Questions people ask
What time is it in MST right now?
5:20 pm (17:20) on Wednesday, 12th August 2026, for US & Canada Mountain. Careful: MST means 2 different things — the other meanings and their current times are listed below.
What does MST stand for?
Mountain Standard Time. UTC-7 in winter, UTC-6 (MDT) in summer.
What is the UTC offset of MST?
US & Canada Mountain: UTC-6; Arizona — MST all year: UTC-7.
Why does MST mean more than one time zone?
Time-zone abbreviations were never standardised — several countries independently picked the same letters. MST is one of the worst offenders, with 2 meanings in current use. This is why calendar software and databases use IANA identifiers like America/Denver instead: they are unique, and they carry the daylight-saving rules with them.