GMT to MST converter
MST is 6 hours behind GMT right now. Live clocks on both sides, a direct time input, the full 24-hour table with a permalink per hour, and the real daylight-saving state — computed from the IANA tz database on every request, never from a stored offset.
Convert an exact time type it — no sliders
Conversion runs in your browser against the same IANA rules the server uses, so it keeps working offline and nothing you type is sent anywhere.
Daylight saving right now
Mountain Standard Time
America/Denver is currently on MDT (UTC-06:00), its daylight-saving clock. That is not MST — this page is named for the abbreviation people search for, and tells you the truth about which one is actually in force.
next change: Sun, 1 Nov 2026 01:00 local → MST (80 days, clocks go back)
MST is UTC-7. Denver switches to MDT (UTC-6) for summer; Phoenix does not — Arizona stays on MST all year, so half the year Phoenix and Denver disagree.
Greenwich Mean Time
Etc/GMT is on GMT (UTC+00:00).
no clock change scheduled — fixed at UTC+00:00
GMT is UTC+0 and never shifts. The UK observes GMT in winter only — in summer it is on BST (UTC+1), so "GMT" on a British invite dated in July usually means BST.
Best time to call green = 09:00–18:00 on both sides
3 overlapping working hours. The longest run is 15:00–18:00 GMT, which is 09:00–12:00 MST.
GMT to MST, hour by hour 13 August 2026 · every row is a permalink
| GMT | MST | 12-hour | Day | Permalink |
|---|---|---|---|---|
| 00:00 | 18:00 MDT | 6:00 PM | previous day | 00:00 → |
| 01:00 | 19:00 MDT | 7:00 PM | previous day | 01:00 → |
| 02:00 | 20:00 MDT | 8:00 PM | previous day | 02:00 → |
| 03:00 | 21:00 MDT | 9:00 PM | previous day | 03:00 → |
| 04:00 | 22:00 MDT | 10:00 PM | previous day | 04:00 → |
| 05:00 | 23:00 MDT | 11:00 PM | previous day | 05:00 → |
| 06:00 | 00:00 MDT | 12:00 AM | same day | 06:00 → |
| 07:00 | 01:00 MDT | 1:00 AM | same day | 07:00 → |
| 08:00 | 02:00 MDT | 2:00 AM | same day | 08:00 → |
| 09:00 | 03:00 MDT | 3:00 AM | same day | 09:00 → |
| 10:00 | 04:00 MDT | 4:00 AM | same day | 10:00 → |
| 11:00 | 05:00 MDT | 5:00 AM | same day | 11:00 → |
| 12:00 | 06:00 MDT | 6:00 AM | same day | 12:00 → |
| 13:00 | 07:00 MDT | 7:00 AM | same day | 13:00 → |
| 14:00 | 08:00 MDT | 8:00 AM | same day | 14:00 → |
| 15:00 | 09:00 MDT | 9:00 AM | same day | 15:00 → |
| 16:00 | 10:00 MDT | 10:00 AM | same day | 16:00 → |
| 17:00 | 11:00 MDT | 11:00 AM | same day | 17:00 → |
| 18:00 | 12:00 MDT | 12:00 PM | same day | 18:00 → |
| 19:00 | 13:00 MDT | 1:00 PM | same day | 19:00 → |
| 20:00 | 14:00 MDT | 2:00 PM | same day | 20:00 → |
| 21:00 | 15:00 MDT | 3:00 PM | same day | 21:00 → |
| 22:00 | 16:00 MDT | 4:00 PM | same day | 22:00 → |
| 23:00 | 17:00 MDT | 5:00 PM | same day | 23:00 → |