12:00 am GMT to MST — 5:00 pm (previous day) MST
12:00 am Greenwich Mean Time (GMT) is 5:00 pm (previous day) Mountain Time (MST) while both regions are on standard time. Neither zone changes this result during the year, so the same answer holds in January and in July.
Standard time
5:00 pm (previous day)Applies while neither zone is on daylight saving — broadly November to March in the northern hemisphere.
Convert a time
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GMT to MST — every hour
Both columns are computed from the IANA database, so they follow the real transition dates.
| GMT | MST — standard |
|---|---|
| 12:00 am | 5:00 pm (previous day) |
| 1:00 am | 6:00 pm (previous day) |
| 2:00 am | 7:00 pm (previous day) |
| 3:00 am | 8:00 pm (previous day) |
| 4:00 am | 9:00 pm (previous day) |
| 5:00 am | 10:00 pm (previous day) |
| 6:00 am | 11:00 pm (previous day) |
| 7:00 am | 12:00 am |
| 8:00 am | 1:00 am |
| 9:00 am | 2:00 am |
| 10:00 am | 3:00 am |
| 11:00 am | 4:00 am |
| 12:00 pm | 5:00 am |
| 1:00 pm | 6:00 am |
| 2:00 pm | 7:00 am |
| 3:00 pm | 8:00 am |
| 4:00 pm | 9:00 am |
| 5:00 pm | 10:00 am |
| 6:00 pm | 11:00 am |
| 7:00 pm | 12:00 pm |
| 8:00 pm | 1:00 pm |
| 9:00 pm | 2:00 pm |
| 10:00 pm | 3:00 pm |
| 11:00 pm | 4:00 pm |
Questions people ask
5:00 pm (previous day) MST. The gap between the two zones does not change during the year, so this holds all year.
It does not. Either both zones change their clocks on the same dates, or neither observes daylight saving, so the difference between them stays fixed.
Send a calendar invitation rather than a clock time in an email. Calendar software stores the underlying instant and re-renders it for each attendee, so a shifted offset is handled automatically.
Booking something recurring?
A fixed clock time drifts when either side changes its clocks. Our guides explain how to stop that happening.