GMT to MST converter
MST is usually 6 h behind GMT. It is 7 h behind GMT 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.
GMT to MST table
For 5 July 2026, when MST is 6 h behind GMT. Other dates: see the table on the right.
| GMT | MST |
|---|---|
| 12:00 AM | 6:00 PM prev. day |
| 1:00 AM | 7:00 PM prev. day |
| 2:00 AM | 8:00 PM prev. day |
| 3:00 AM | 9:00 PM prev. day |
| 4:00 AM | 10:00 PM prev. day |
| 5:00 AM | 11:00 PM prev. day |
| 6:00 AM | 12:00 AM |
| 7:00 AM | 1:00 AM |
| 8:00 AM | 2:00 AM |
| 9:00 AM | 3:00 AM |
| 10:00 AM | 4:00 AM |
| 11:00 AM | 5:00 AM |
| 12:00 PM | 6:00 AM |
| 1:00 PM | 7:00 AM |
| 2:00 PM | 8:00 AM |
| 3:00 PM | 9:00 AM |
| 4:00 PM | 10:00 AM |
| 5:00 PM | 11:00 AM |
| 6:00 PM | 12:00 PM |
| 7:00 PM | 1:00 PM |
| 8:00 PM | 2:00 PM |
| 9:00 PM | 3:00 PM |
| 10:00 PM | 4:00 PM |
| 11:00 PM | 5:00 PM |
When the difference changes
Computed from the IANA tz database (release 2026c). Governments can change these rules; the live converter uses your browser’s own copy of the database.
| 2026: from (UTC) | until (UTC) | MST vs GMT |
|---|---|---|
| 1 January 2026 | 8 March 2026 | 7 h behind |
| 8 March 2026 | 1 November 2026 | 6 h behind |
| 1 November 2026 | 31 December 2026 | 7 h behind |
| 2027: from (UTC) | until (UTC) | MST vs GMT |
|---|---|---|
| 1 January 2027 | 14 March 2027 | 7 h behind |
| 14 March 2027 | 7 November 2027 | 6 h behind |
| 7 November 2027 | 31 December 2027 | 7 h behind |
GMT: Greenwich Mean Time · GMT time now
GMT here means the fixed UTC+0 offset. The UK only uses GMT in winter; in summer London is on BST (UTC+1).
MST: Mountain Time · MST time now
Arizona (America/Phoenix) stays on MST all year, so for part of the year it matches Pacific Time instead of Denver.
Related converters
Questions
What is the time difference between GMT and MST?
MST is usually 6 h behind GMT. It is 7 h behind GMT 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.
What is 9 am GMT in MST?
9:00 am GMT is 3:00 AM MST, on dates when the usual difference applies. Use the converter above for any specific date.
Which GMT does this page use?
GMT here means the fixed UTC+0 offset. The UK only uses GMT in winter; in summer London is on BST (UTC+1).
Which MST does this page use?
Arizona (America/Phoenix) stays on MST all year, so for part of the year it matches Pacific Time instead of Denver.