IST to MST
On Oct 23, 2026, Mountain Time is 11 hours 30 minutes behind India Standard Time: 9:00 AM IST is 9:30 PM MDT the previous day. The gap changes during the year because of daylight saving time; the dates are below.
MST vs IST over the next 12 months
| Period | MST is | Example |
|---|---|---|
| Oct 23, 2026 to Nov 1, 2026 | 11 hours 30 minutes behind | 9:00 AM IST = 9:30 PM MDT (previous day) |
| Nov 1, 2026 to Mar 14, 2027 | 12 hours 30 minutes behind | 9:00 AM IST = 8:30 PM MST (previous day) |
| Mar 14, 2027 onwards | 11 hours 30 minutes behind | 9:00 AM IST = 9:30 PM MDT (previous day) |
IST to MST conversion table
Every hour of a weekday around Oct 23, 2026, in both zones.
| India Standard Time | Mountain Time |
|---|---|
| 12:00 AM | 12:30 PM (previous day) |
| 1:00 AM | 1:30 PM (previous day) |
| 2:00 AM | 2:30 PM (previous day) |
| 3:00 AM | 3:30 PM (previous day) |
| 4:00 AM | 4:30 PM (previous day) |
| 5:00 AM | 5:30 PM (previous day) |
| 6:00 AM | 6:30 PM (previous day) |
| 7:00 AM | 7:30 PM (previous day) |
| 8:00 AM | 8:30 PM (previous day) |
| 9:00 AM | 9:30 PM (previous day) |
| 10:00 AM | 10:30 PM (previous day) |
| 11:00 AM | 11:30 PM (previous day) |
| 12:00 PM | 12:30 AM |
| 1:00 PM | 1:30 AM |
| 2:00 PM | 2:30 AM |
| 3:00 PM | 3:30 AM |
| 4:00 PM | 4:30 AM |
| 5:00 PM | 5:30 AM |
| 6:00 PM | 6:30 AM |
| 7:00 PM | 7:30 AM |
| 8:00 PM | 8:30 AM |
| 9:00 PM | 9:30 AM |
| 10:00 PM | 10:30 AM |
| 11:00 PM | 11:30 AM |
Best time for a meeting
There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 30 minutes on a weekday: 7:30 PM–8:00 PM IST, which is 8:00 AM–8:30 AM MDT.
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Daylight saving time
Mountain Time (MST/MDT)
- Nov 1, 2026: clocks go back 1 hour at 2:00 AM (UTC−6 → UTC−7)
- Mar 14, 2027: clocks go forward 1 hour at 2:00 AM (UTC−7 → UTC−6)
Where these clocks are used
- India Standard Time (IST): all of India: Mumbai, Delhi, Bengaluru, Chennai. IANA zone
Asia/Kolkata. - Mountain Time (MST/MDT): Denver, Salt Lake City, Calgary. IANA zone
America/Denver.
Questions
What time is it in MST when it is 9 AM IST?
On Oct 23, 2026, 9:00 AM IST is 9:30 PM MDT the previous day. On other dates the answer can shift by an hour because of daylight saving time; the table of periods on this page gives each one.
How many hours behind IST is MST?
It depends on the date. Oct 23, 2026 to Nov 1, 2026: MST is 11 hours 30 minutes behind. Nov 1, 2026 to Mar 14, 2027: MST is 12 hours 30 minutes behind. Mar 14, 2027 onwards: MST is 11 hours 30 minutes behind.
Do IST and MST observe daylight saving time?
India Standard Time stays on UTC+5:30 all year. Mountain Time switches to MDT (UTC−6) in summer and back to MST (UTC−7) in winter.
What is the best time for a meeting between IST and MST?
There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 30 minutes on a weekday: 7:30 PM–8:00 PM IST, which is 8:00 AM–8:30 AM MDT.
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Related conversions
- MST to IST (reverse)
- EST to MST
- CST to MST
- PST to MST
- UTC to MST
- GMT to MST
- CET to MST
- IST to EST
- IST to CST
- IST to PST
- IST to UTC
- IST to GMT
- All time zones
Computed from the IANA time zone database on Oct 23, 2026. Live clocks and the converter use your browser's copy of the same data.