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Timezone Prime

MST to IST converter

Convert Mountain Time (MST/MDT) to India Standard Time (IST), with daylight saving applied for the exact date you pick.

From

Tue, Oct 27

To

Tue, Oct 27 Same day

MDT 9 to 5 IST 9 to 5

From zone
Mountain Daylight Time
Offset and clock
UTC−6 Daylight saving time
IANA name
America/Denver
To zone
India Standard Time
Offset and clock
UTC+5:30 No daylight saving time
IANA name
Asia/Kolkata

IST is 11 hours 30 minutes ahead of MDT.

Time difference
IST is 11 hours 30 minutes ahead of MDT for most of the year (238 days in 2026). The gap is 12 hours 30 minutes for about 18 weeks in 2026.
Meeting window
Working days of 9 AM to 5 PM do not overlap. The least disruptive slot is around 6:00 AM MDT, which is 5:30 PM IST while MDT and IST apply.
Daylight saving
Mountain Time changes its clocks twice a year; India Standard Time does not.

The same conversion works for every city on these clocks, such as Denver to India, Denver to Delhi and Arizona to India.

Where MST and IST apply

Shaded areas follow the official zone boundaries, so a country split across zones is split here too. Hover or tap a region for its local time.

  • Mountain Time
  • India Standard Time
  • Same UTC offset right now, different zone rules

Drag to pan. Ctrl and scroll, or pinch, to zoom. Boundaries: timezone-boundary-builder, © OpenStreetMap contributors

Hour by hour

Every hour of Tuesday, October 27, 2026, side by side. Days with a clock change show 23 or 25 rows.

Shaded rows fall inside working hours in both places.

Hourly comparison of the two time zones. Choose a time to load it in the converter.
Denver (MDT) New Delhi (IST) Working hours
12:00 AM 11:30 AM
1:00 AM 12:30 PM
2:00 AM 1:30 PM
3:00 AM 2:30 PM
4:00 AM 3:30 PM
5:00 AM 4:30 PM
6:00 AM 5:30 PM
7:00 AM 6:30 PM
8:00 AM 7:30 PM
9:00 AM 8:30 PM
10:00 AM 9:30 PM
11:00 AM 10:30 PM
12:00 PM 11:30 PM
1:00 PM 12:30 AM next day
2:00 PM 1:30 AM next day
3:00 PM 2:30 AM next day
4:00 PM 3:30 AM next day
5:00 PM 4:30 AM next day
6:00 PM 5:30 AM next day
7:00 PM 6:30 AM next day
8:00 PM 7:30 AM next day
9:00 PM 8:30 AM next day
10:00 PM 9:30 AM next day
11:00 PM 10:30 AM next day

MST to IST conversion table

Every hour of the Mountain Time day, plus the common half hours, and their IST equivalents. The second column covers the part of the year when the clocks are on a different gap.

MST to IST conversion table
Mountain Time IST 11 h 30 min ahead, most of the year (238 days in 2026) IST 12 h 30 min ahead, about 18 weeks in 2026
12:00 AM 11:30 AM12:30 PM
1:00 AM 12:30 PM1:30 PM
2:00 AM 1:30 PM2:30 PM
3:00 AM 2:30 PM3:30 PM
4:00 AM 3:30 PM4:30 PM
5:00 AM 4:30 PM5:30 PM
6:00 AM 5:30 PM6:30 PM
7:00 AM 6:30 PM7:30 PM
8:00 AM 7:30 PM8:30 PM
9:00 AM 8:30 PM9:30 PM
9:30 AM 9:00 PM10:00 PM
10:00 AM 9:30 PM10:30 PM
10:30 AM 10:00 PM11:00 PM
11:00 AM 10:30 PM11:30 PM
11:30 AM 11:00 PM12:00 AM (next day)
12:00 PM 11:30 PM12:30 AM (next day)
12:30 PM 12:00 AM (next day)1:00 AM (next day)
1:00 PM 12:30 AM (next day)1:30 AM (next day)
1:30 PM 1:00 AM (next day)2:00 AM (next day)
2:00 PM 1:30 AM (next day)2:30 AM (next day)
2:30 PM 2:00 AM (next day)3:00 AM (next day)
3:00 PM 2:30 AM (next day)3:30 AM (next day)
3:30 PM 3:00 AM (next day)4:00 AM (next day)
4:00 PM 3:30 AM (next day)4:30 AM (next day)
4:30 PM 4:00 AM (next day)5:00 AM (next day)
5:00 PM 4:30 AM (next day)5:30 AM (next day)
5:30 PM 5:00 AM (next day)6:00 AM (next day)
6:00 PM 5:30 AM (next day)6:30 AM (next day)
7:00 PM 6:30 AM (next day)7:30 AM (next day)
8:00 PM 7:30 AM (next day)8:30 AM (next day)
9:00 PM 8:30 AM (next day)9:30 AM (next day)
10:00 PM 9:30 AM (next day)10:30 AM (next day)
11:00 PM 10:30 AM (next day)11:30 AM (next day)

How the gap changes in 2026 and 2027

Each row is a stretch of days with one constant difference, split at every clock change.

Time difference periods between MST and IST
Dates MST IST Difference
Thu, Jan 1, 2026 until Sun, Mar 8, 2026 MST IST IST 12 h 30 min ahead
Sun, Mar 8, 2026 until Sun, Nov 1, 2026 MDT IST IST 11 h 30 min ahead
Sun, Nov 1, 2026 until Sun, Mar 14, 2027 MST IST IST 12 h 30 min ahead
Sun, Mar 14, 2027 until Sun, Nov 7, 2027 MDT IST IST 11 h 30 min ahead
Sun, Nov 7, 2027 until Sat, Jan 1, 2028 MST IST IST 12 h 30 min ahead

Upcoming clock changes

  1. Mountain Time Sunday, November 1, 2026: at 2:00 AM clocks go back 1 hour to 1:00 AM
  2. Mountain Time Sunday, March 14, 2027: at 2:00 AM clocks go forward 1 hour to 3:00 AM
  3. Mountain Time Sunday, November 7, 2027: at 2:00 AM clocks go back 1 hour to 1:00 AM
  4. Mountain Time Sunday, March 12, 2028: at 2:00 AM clocks go forward 1 hour to 3:00 AM

About the two zones

Mountain Time (MST / MDT)

Mountain Time follows the clock in Denver: Mountain Standard Time (MST, UTC−7) in winter and Mountain Daylight Time (MDT, UTC−6) during US daylight saving time.

IANA zone
America/Denver
Offset
UTC−7 standard, UTC−6 daylight saving
Used in
the mountain states of the US and parts of Canada
Major cities
Denver, Salt Lake City, Albuquerque, Calgary, Edmonton, Boise

Most of Arizona stays on MST all year and does not switch to MDT. For Phoenix, pick America/Phoenix in the converter.

India Standard Time (IST)

India Standard Time is UTC+5:30 all year. The whole country keeps a single clock, and India has not observed daylight saving time since the 1940s, so IST never changes.

IANA zone
Asia/Kolkata
Offset
UTC+5:30 all year
Used in
India
Major cities
Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata

IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).

MST and IST, answered

What is the time difference between MST and IST?

IST is 11 hours 30 minutes ahead of MDT for most of the year (238 days in 2026). The gap is 12 hours 30 minutes for about 18 weeks in 2026.

How do I work out the time in India from MST?

India uses India Standard Time. IST is 11 hours 30 minutes ahead of MDT for most of the year (238 days in 2026). The gap is 12 hours 30 minutes for about 18 weeks in 2026. Type any MST time into the MST to IST converter to see the India time for any date.

What is 9:00 AM MST in IST?

9:00 AM MDT is 8:30 PM IST for most of the year (238 days in 2026). 9:00 AM MST is 9:30 PM IST for about 18 weeks in 2026.

What is 12:00 PM MST in IST?

12:00 PM MDT is 11:30 PM IST for most of the year (238 days in 2026). 12:00 PM MST is 12:30 AM (next day) IST for about 18 weeks in 2026.

What is 10:00 AM MST in IST?

10:00 AM MDT is 9:30 PM IST for most of the year (238 days in 2026). 10:00 AM MST is 10:30 PM IST for about 18 weeks in 2026.

What is 5:00 PM MST in IST?

5:00 PM MDT is 4:30 AM (next day) IST for most of the year (238 days in 2026). 5:00 PM MST is 5:30 AM (next day) IST for about 18 weeks in 2026.

Is IST ahead of MST, and by how many hours?

Yes. IST is 11 hours 30 minutes ahead of MDT for most of the year (238 days in 2026). The gap is 12 hours 30 minutes for about 18 weeks in 2026.

What is a good meeting time for MST and IST?

Working days of 9 AM to 5 PM do not overlap. The least disruptive slot is around 6:00 AM MDT, which is 5:30 PM IST while MDT and IST apply.

Does daylight saving time affect MST to IST?

Mountain Time changes its clocks twice a year; India Standard Time does not. The next change is on Sunday, November 1, 2026 in Mountain Time.

Which MST does the MST to IST converter use?

Most of Arizona stays on MST all year and does not switch to MDT. For Phoenix, pick America/Phoenix in the converter.

Which IST does the MST to IST converter use?

IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).

Related conversions

From Mountain Time

To India Standard Time