Time in IST and MST
The time difference between Irish Standard Time (IST) and Mountain Standard Time (MST) is 8 hours. Mountain Standard Time is 8 hours behind Irish Standard Time.
This means 9am IST is 1am MST and 5pm IST is 9am MST.
Irish Standard Time
- The current local time in IST is 2:38 pm (July 18, 2026)
- IST time zone offset is UTC+01:00
Mountain Standard Time
- The current local time in MST is 8:38 pm (July 18, 2026)
- MST time zone offset is UTC-07:00
How to convert Irish Standard Time to Mountain Standard Time?
Subtract 8 hours from Irish Standard Time to get Mountain Standard Time.
Time in IST
00:00
Time in MST
00:00
Use the slider above to convert Irish 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
| IST | MST |
|---|---|
| 12am | 4pm |
| 1am | 5pm |
| 2am | 6pm |
| 3am | 7pm |
| 4am | 8pm |
| 5am | 9pm |
| 6am | 10pm |
| 7am | 11pm |
| 8am | 12am |
| 9am | 1am |
| 10am | 2am |
| 11am | 3am |
| 12pm | 4am |
| 1pm | 5am |
| 2pm | 6am |
| 3pm | 7am |
| 4pm | 8am |
| 5pm | 9am |
| 6pm | 10am |
| 7pm | 11am |
| 8pm | 12pm |
| 9pm | 1pm |
| 10pm | 2pm |
| 11pm | 3pm |