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IST to MST converter
India Standard Time
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Mountain Time
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Mountain Time is 11 hours 30 minutes behind India Standard Time for most of the year, and 12 hours 30 minutes behind for part of it, because the two change their clocks on different dates (or only one of them changes at all).
When does the difference change?
In 2026:
- January 1 to March 7: Mountain Time is 12 hours 30 minutes behind India Standard Time
- March 8 to October 31: Mountain Time is 11 hours 30 minutes behind India Standard Time
- November 1 to December 31: Mountain Time is 12 hours 30 minutes behind India Standard Time
Questions
What time is 9 AM IST in MST?
For most of the year, 9 AM India Standard Time is 9:30 PM the day before Mountain Time. For part of the year it is 8:30 PM the day before, because of daylight saving time.
How many hours ahead or behind is MST from IST?
Mountain Time is 11 hours 30 minutes behind India Standard Time for most of the year, and 12 hours 30 minutes behind for part of it, because the two change their clocks on different dates (or only one of them changes at all).
Does the IST to MST difference change?
Yes. It changes 2 times in 2026 because of daylight saving time.
About these time zones
IST to MST, hour by hour
| India Standard Time | Mountain Time |
|---|---|
| 12 AM | 12:30 PM (previous day) |
| 1 AM | 1:30 PM (previous day) |
| 2 AM | 2:30 PM (previous day) |
| 3 AM | 3:30 PM (previous day) |
| 4 AM | 4:30 PM (previous day) |
| 5 AM | 5:30 PM (previous day) |
| 6 AM | 6:30 PM (previous day) |
| 7 AM | 7:30 PM (previous day) |
| 8 AM | 8:30 PM (previous day) |
| 9 AM | 9:30 PM (previous day) |
| 10 AM | 10:30 PM (previous day) |
| 11 AM | 11:30 PM (previous day) |
| 12 PM | 12:30 AM |
| 1 PM | 1:30 AM |
| 2 PM | 2:30 AM |
| 3 PM | 3:30 AM |
| 4 PM | 4:30 AM |
| 5 PM | 5:30 AM |
| 6 PM | 6:30 AM |
| 7 PM | 7:30 AM |
| 8 PM | 8:30 AM |
| 9 PM | 9:30 AM |
| 10 PM | 10:30 AM |
| 11 PM | 11:30 AM |
Based on the clocks on Monday, October 12, 2026. Use the converter above for another date.