Riyadh Time to MST Converter
MST is 10 hours behind UTC+3. 9:00 AM UTC+3 = 11:00 PM MST (previous day).
MST is 10 hours behind UTC+3 at the moment. To convert Riyadh Time to MST, subtract 10 hours from the Riyadh Time time: 9:00 AM UTC+3 = 11:00 PM MST (previous day).
Riyadh Time (Riyadh time) is used in Riyadh, Saudi Arabia. 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.
Riyadh Time to MST time conversion table
Riyadh Time to MST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| Riyadh Time | MST | Day |
|---|---|---|
| 12:00 AM UTC+3 | 2:00 PM MST | previous day |
| 1:00 AM UTC+3 | 3:00 PM MST | previous day |
| 2:00 AM UTC+3 | 4:00 PM MST | previous day |
| 3:00 AM UTC+3 | 5:00 PM MST | previous day |
| 4:00 AM UTC+3 | 6:00 PM MST | previous day |
| 5:00 AM UTC+3 | 7:00 PM MST | previous day |
| 6:00 AM UTC+3 | 8:00 PM MST | previous day |
| 7:00 AM UTC+3 | 9:00 PM MST | previous day |
| 8:00 AM UTC+3 | 10:00 PM MST | previous day |
| 9:00 AM UTC+3 | 11:00 PM MST | previous day |
| 10:00 AM UTC+3 | 12:00 AM MST | night |
| 11:00 AM UTC+3 | 1:00 AM MST | night |
| 12:00 PM UTC+3 | 2:00 AM MST | night |
| 1:00 PM UTC+3 | 3:00 AM MST | night |
| 2:00 PM UTC+3 | 4:00 AM MST | night |
| 3:00 PM UTC+3 | 5:00 AM MST | night |
| 4:00 PM UTC+3 | 6:00 AM MST | — |
| 5:00 PM UTC+3 | 7:00 AM MST | — |
| 6:00 PM UTC+3 | 8:00 AM MST | — |
| 7:00 PM UTC+3 | 9:00 AM MST | — |
| 8:00 PM UTC+3 | 10:00 AM MST | — |
| 9:00 PM UTC+3 | 11:00 AM MST | — |
| 10:00 PM UTC+3 | 12:00 PM MST | — |
| 11:00 PM UTC+3 | 1:00 PM MST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert Riyadh Time to MST
Subtract 10 hours from the Riyadh Time time to get MST.
Example: 9:00 AM UTC+3 = 11:00 PM MST (previous day).
Across midnight: 1:00 AM UTC+3 = 3:00 PM MST (previous day). The date changes, so always check the day as well as the hour.
Time difference between Riyadh Time and MST
The time difference between Riyadh Time 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 10 hours behind of Riyadh Time.
- 8 Mar 2026 – 31 Oct 2026: MST is 9 hours behind of Riyadh Time.
- 1 Nov 2026 – 31 Dec 2026: MST is 10 hours behind of Riyadh Time.
Riyadh Time and MST during daylight saving time
- Riyadh Time does not observe daylight saving time; it stays on UTC+3 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 Riyadh Time and MST
Riyadh Time and MST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM UTC+3, which is 9:00 PM MST.
Riyadh Time to MST FAQ
What is the time difference between Riyadh Time and MST?
Right now MST is 10 hours behind UTC+3. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM Riyadh Time in MST?
9:00 AM UTC+3 is 11:00 PM MST (previous day).
What is 12 PM (noon) Riyadh Time in MST?
12:00 PM UTC+3 is 2:00 AM MST.
Is MST ahead of or behind Riyadh Time?
MST is 10 hours behind UTC+3, so it is earlier in MST than in Riyadh Time.
Does Riyadh Time change for daylight saving time?
No. Riyadh Time 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 Riyadh Time and MST?
Riyadh Time and MST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM UTC+3, which is 9:00 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 Riyadh Time
Convert Riyadh Time to other time zones
Convert other time zones to MST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.