Time in MST and IRST
The time difference between Mountain Standard Time (MST) and Iran Standard Time (IRST) is 10 hours 30 minutes. Iran Standard Time is 10 hours 30 minutes ahead of Mountain Standard Time.
This means 9am MST is 7:30pm IRST and 5pm MST is 3:30am IRST (next day).
Mountain Standard Time
- The current local time in MST is 3:27 am (July 3, 2026)
- MST time zone offset is UTC-07:00
Iran Standard Time
- The current local time in IRST is 11:57 pm (July 2, 2026)
- IRST time zone offset is UTC+03:30
How to convert Mountain Standard Time to Iran Standard Time?
Add 10 hours 30 minutes to Mountain Standard Time to get Iran Standard Time.
Time in MST
00:00
Time in IRST
00:00
Use the slider above to convert Mountain Standard Time to Iran 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
| MST | IRST |
|---|---|
| 12am | 10:30am |
| 1am | 11:30am |
| 2am | 12:30pm |
| 3am | 1:30pm |
| 4am | 2:30pm |
| 5am | 3:30pm |
| 6am | 4:30pm |
| 7am | 5:30pm |
| 8am | 6:30pm |
| 9am | 7:30pm |
| 10am | 8:30pm |
| 11am | 9:30pm |
| 12pm | 10:30pm |
| 1pm | 11:30pm |
| 2pm | 0:30am |
| 3pm | 1:30am |
| 4pm | 2:30am |
| 5pm | 3:30am |
| 6pm | 4:30am |
| 7pm | 5:30am |
| 8pm | 6:30am |
| 9pm | 7:30am |
| 10pm | 8:30am |
| 11pm | 9:30am |