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MST to GMT converter
Mountain Time
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Greenwich Mean Time
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Greenwich Mean Time is 6 hours ahead of Mountain Time for most of the year, and 7 hours ahead of for part of it, because the two change their clocks on different dates (or only one of them changes at all).
When does the difference change?
In 2026:
- January 1 to March 7: Greenwich Mean Time is 7 hours ahead of Mountain Time
- March 8 to October 31: Greenwich Mean Time is 6 hours ahead of Mountain Time
- November 1 to December 31: Greenwich Mean Time is 7 hours ahead of Mountain Time
Questions
What time is 9 AM MST in GMT?
For most of the year, 9 AM Mountain Time is 3 PM Greenwich Mean Time. For part of the year it is 4 PM, because of daylight saving time.
How many hours ahead or behind is GMT from MST?
Greenwich Mean Time is 6 hours ahead of Mountain Time for most of the year, and 7 hours ahead of for part of it, because the two change their clocks on different dates (or only one of them changes at all).
Does the MST to GMT difference change?
Yes. It changes 2 times in 2026 because of daylight saving time.
About these time zones
MST to GMT, hour by hour
| Mountain Time | Greenwich Mean Time |
|---|---|
| 12 AM | 6 AM |
| 1 AM | 7 AM |
| 2 AM | 8 AM |
| 3 AM | 9 AM |
| 4 AM | 10 AM |
| 5 AM | 11 AM |
| 6 AM | 12 PM |
| 7 AM | 1 PM |
| 8 AM | 2 PM |
| 9 AM | 3 PM |
| 10 AM | 4 PM |
| 11 AM | 5 PM |
| 12 PM | 6 PM |
| 1 PM | 7 PM |
| 2 PM | 8 PM |
| 3 PM | 9 PM |
| 4 PM | 10 PM |
| 5 PM | 11 PM |
| 6 PM | 12 AM (next day) |
| 7 PM | 1 AM (next day) |
| 8 PM | 2 AM (next day) |
| 9 PM | 3 AM (next day) |
| 10 PM | 4 AM (next day) |
| 11 PM | 5 AM (next day) |
Based on the clocks on Monday, October 12, 2026. Use the converter above for another date.