Wazala
Zone to zone

MST to IST — India Standard Time is 12 hours 30 minutes ahead

India Standard Time (IST) is 12 hours 30 minutes ahead of Mountain Time (MST) while both are on standard time. Once daylight saving starts the gap becomes 11 hours 30 minutes ahead, so any recurring meeting between these two regions moves by an hour twice a year.

Standard time

12 hours 30 minutes ahead

Applies while neither zone is on daylight saving — broadly November to March in the northern hemisphere.

Daylight saving

11 hours 30 minutes ahead

Applies while the clocks are forward. This pair does not keep a constant gap, so check the date.

Full-day table Questions

Convert a time

Live
—

Your device reports your local zone. Everything is calculated in your browser.

How the two zones line up

Mountain Time sits at UTC−7 in winter and UTC−6 in summer. India Standard Time sits at UTC+5:30 all year. The difference between those two offsets is the number you add or subtract.

Daylight saving

Standard working days do not overlap at all. One side will need to take the call early or late, so alternate who makes the sacrifice.

Where this conversion gets used

  • Offshore development stand-ups
  • overnight support handovers
  • outsourced finance teams
  • supplier calls

MST to IST — every hour

Both columns are computed from the IANA database, so they follow the real transition dates.

MST IST — standard IST — daylight saving
12:00 am 12:30 pm 11:30 am
1:00 am 1:30 pm 12:30 pm
2:00 am 2:30 pm 1:30 pm
3:00 am 3:30 pm 2:30 pm
4:00 am 4:30 pm 3:30 pm
5:00 am 5:30 pm 4:30 pm
6:00 am 6:30 pm 5:30 pm
7:00 am 7:30 pm 6:30 pm
8:00 am 8:30 pm 7:30 pm
9:00 am 9:30 pm 8:30 pm
10:00 am 10:30 pm 9:30 pm
11:00 am 11:30 pm 10:30 pm
12:00 pm 12:30 am (next day) 11:30 pm
1:00 pm 1:30 am (next day) 12:30 am (next day)
2:00 pm 2:30 am (next day) 1:30 am (next day)
3:00 pm 3:30 am (next day) 2:30 am (next day)
4:00 pm 4:30 am (next day) 3:30 am (next day)
5:00 pm 5:30 am (next day) 4:30 am (next day)
6:00 pm 6:30 am (next day) 5:30 am (next day)
7:00 pm 7:30 am (next day) 6:30 am (next day)
8:00 pm 8:30 am (next day) 7:30 am (next day)
9:00 pm 9:30 am (next day) 8:30 am (next day)
10:00 pm 10:30 am (next day) 9:30 am (next day)
11:00 pm 11:30 am (next day) 10:30 am (next day)

Questions people ask

12 hours 30 minutes ahead during standard time, and 11 hours 30 minutes ahead while daylight saving is running.

Related conversions

UTC to BST CST to IST CST to JST PST to AEST

All conversions →

Booking something recurring?

A fixed clock time drifts when either side changes its clocks. Our guides explain how to stop that happening.

Read the DST guide Plan a meeting