GST to MST Converter
MST is 11 hours behind GST. 9:00 AM GST = 10:00 PM MST (previous day).
MST is 11 hours behind GST at the moment. To convert GST to MST, subtract 11 hours from the GST time: 9:00 AM GST = 10:00 PM MST (previous day).
GST (Gulf Time) is used in United Arab Emirates and Oman. MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year.
Most of Arizona uses MST all year and does not switch to MDT.
GST to MST time conversion table
GST to MST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| GST | MST |
|---|---|
| 12:00 AM | 1:00 PM−1 |
| 1:00 AM | 2:00 PM−1 |
| 2:00 AM | 3:00 PM−1 |
| 3:00 AM | 4:00 PM−1 |
| 4:00 AM | 5:00 PM−1 |
| 5:00 AM | 6:00 PM−1 |
| 6:00 AM | 7:00 PM−1 |
| 7:00 AM | 8:00 PM−1 |
| GST | MST |
|---|---|
| 8:00 AM | 9:00 PM−1 |
| 9:00 AM | 10:00 PM−1 |
| 10:00 AM | 11:00 PM−1 |
| 11:00 AM | 12:00 AM |
| 12:00 PM | 1:00 AM |
| 1:00 PM | 2:00 AM |
| 2:00 PM | 3:00 AM |
| 3:00 PM | 4:00 AM |
| GST | MST |
|---|---|
| 4:00 PM | 5:00 AM |
| 5:00 PM | 6:00 AM |
| 6:00 PM | 7:00 AM |
| 7:00 PM | 8:00 AM |
| 8:00 PM | 9:00 AM |
| 9:00 PM | 10:00 AM |
| 10:00 PM | 11:00 AM |
| 11:00 PM | 12:00 PM |
Conversion table from GST to MST for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in MST, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert GST to MST
Subtract 11 hours from the GST time to get MST.
Example: 9:00 AM GST = 10:00 PM MST (previous day).
Across midnight: 1:00 AM GST = 2:00 PM MST (previous day). The date changes, so always check the day as well as the hour.
Time difference between GST and MST
The time difference between GST and MST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 7 Mar 2026: MST is 11 hours behind of GST.
- 8 Mar 2026 – 31 Oct 2026: MST is 10 hours behind of GST.
- 1 Nov 2026 – 31 Dec 2026: MST is 11 hours behind of GST.
GST and MST during daylight saving time
- GST does not observe daylight saving time; it stays on UTC+4 all year.
- MST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from MST (UTC−7) to MDT (UTC−6).
Best time for a meeting between GST and MST
GST and MST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM GST, which is 8:00 PM MST.
GST to MST FAQ
What is the time difference between GST and MST?
Right now MST is 11 hours behind GST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM GST in MST?
9:00 AM GST is 10:00 PM MST (previous day).
What is 12 PM (noon) GST in MST?
12:00 PM GST is 1:00 AM MST.
Is MST ahead of or behind GST?
MST is 11 hours behind GST, so it is earlier in MST than in GST.
Does GST change for daylight saving time?
No. GST stays on the same offset all year, so conversions never shift for daylight saving time.
Does MST change for daylight saving time?
Yes. MST next changes on 14 Mar 2027, when clocks go forward one hour from MST to MDT.
What is the best time for a meeting between GST and MST?
GST and MST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM GST, which is 8:00 PM MST.
Is MT the same as MST?
MST is the winter (standard) name of Mountain Time (MT). From March to November the same clocks are called MDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert MST to GST
Convert GST to other time zones
Convert other time zones to MST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.