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MST to GST converter
Mountain Time
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Gulf Standard Time
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Gulf Standard Time is 10 hours ahead of Mountain Time for most of the year, and 11 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: Gulf Standard Time is 11 hours ahead of Mountain Time
- March 8 to October 31: Gulf Standard Time is 10 hours ahead of Mountain Time
- November 1 to December 31: Gulf Standard Time is 11 hours ahead of Mountain Time
Questions
What time is 9 AM MST in GST?
For most of the year, 9 AM Mountain Time is 7 PM Gulf Standard Time. For part of the year it is 8 PM, because of daylight saving time.
How many hours ahead or behind is GST from MST?
Gulf Standard Time is 10 hours ahead of Mountain Time for most of the year, and 11 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 GST difference change?
Yes. It changes 2 times in 2026 because of daylight saving time.
About these time zones
MST to GST, hour by hour
| Mountain Time | Gulf Standard Time |
|---|---|
| 12 AM | 10 AM |
| 1 AM | 11 AM |
| 2 AM | 12 PM |
| 3 AM | 1 PM |
| 4 AM | 2 PM |
| 5 AM | 3 PM |
| 6 AM | 4 PM |
| 7 AM | 5 PM |
| 8 AM | 6 PM |
| 9 AM | 7 PM |
| 10 AM | 8 PM |
| 11 AM | 9 PM |
| 12 PM | 10 PM |
| 1 PM | 11 PM |
| 2 PM | 12 AM (next day) |
| 3 PM | 1 AM (next day) |
| 4 PM | 2 AM (next day) |
| 5 PM | 3 AM (next day) |
| 6 PM | 4 AM (next day) |
| 7 PM | 5 AM (next day) |
| 8 PM | 6 AM (next day) |
| 9 PM | 7 AM (next day) |
| 10 PM | 8 AM (next day) |
| 11 PM | 9 AM (next day) |
Based on the clocks on Monday, October 12, 2026. Use the converter above for another date.