Time in IRST and MST
The time difference between Iran Standard Time (IRST) and Mountain Standard Time (MST) is 10 hours 30 minutes. Mountain Standard Time is 10 hours 30 minutes behind Iran Standard Time.
This means 9am IRST is 10:30pm MST (previous day) and 5pm IRST is 6:30am MST.
Iran Standard Time
- The current local time in IRST is 2:14 am (July 19, 2026)
- IRST time zone offset is UTC+03:30
Mountain Standard Time
- The current local time in MST is 5:44 am (July 19, 2026)
- MST time zone offset is UTC-07:00
How to convert Iran Standard Time to Mountain Standard Time?
Subtract 10 hours 30 minutes from Iran Standard Time to get Mountain Standard Time.
Time in IRST
00:00
Time in MST
00:00
Use the slider above to convert Iran Standard Time to Mountain Standard Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| IRST | MST |
|---|---|
| 12am | 1:30pm |
| 1am | 2:30pm |
| 2am | 3:30pm |
| 3am | 4:30pm |
| 4am | 5:30pm |
| 5am | 6:30pm |
| 6am | 7:30pm |
| 7am | 8:30pm |
| 8am | 9:30pm |
| 9am | 10:30pm |
| 10am | 11:30pm |
| 11am | 0:30am |
| 12pm | 1:30am |
| 1pm | 2:30am |
| 2pm | 3:30am |
| 3pm | 4:30am |
| 4pm | 5:30am |
| 5pm | 6:30am |
| 6pm | 7:30am |
| 7pm | 8:30am |
| 8pm | 9:30am |
| 9pm | 10:30am |
| 10pm | 11:30am |
| 11pm | 12:30pm |