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DateAlmanac

What is IST in MST?

Mountain Time is 12 hours 30 minutes behind

India Standard Time is on UTC+5:30 and Mountain Time is on UTC−7:00 right now. The gap changes during the year — see below.

Convert a time

MST — Mountain Time

12:30 am

MST, Sat

Time in New Delhi
1:59:23 PM
Time in Denver
1:29:23 AM
Difference
−12:30 h
Next clock change
March 14, 2027

When the difference changes

India Standard Time and Mountain Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:

  1. Now – March 14, 2027Mountain Time is 12 hours 30 minutes behind
  2. March 14, 2027 – November 7, 2027Mountain Time is 11 hours 30 minutes behind
  3. November 7, 2027 – onwardsMountain Time is 12 hours 30 minutes behind

Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.

Daylight saving

India Standard Time

No clock changes

India Standard Time stays on IST all year, so its offset from UTC never moves.

Mountain Time

Sunday, March 14, 2027

Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on MDT after that.

IST to MST conversion table

Every hour of Saturday, November 7, 2026, converted from India Standard Time to Mountain Time. 13 of the 24 hours fall on a different calendar day in Denver, which is marked.

12:00 am IST
11:30 am MST−1 day
1:00 am IST
12:30 pm MST−1 day
2:00 am IST
1:30 pm MST−1 day
3:00 am IST
2:30 pm MST−1 day
4:00 am IST
3:30 pm MST−1 day
5:00 am IST
4:30 pm MST−1 day
6:00 am IST
5:30 pm MST−1 day
7:00 am IST
6:30 pm MST−1 day
8:00 am IST
7:30 pm MST−1 day
9:00 am IST
8:30 pm MST−1 day
10:00 am IST
9:30 pm MST−1 day
11:00 am IST
10:30 pm MST−1 day
12:00 pm IST
11:30 pm MST−1 day
1:00 pm IST
12:30 am MST
2:00 pm IST
1:30 am MST
3:00 pm IST
2:30 am MST
4:00 pm IST
3:30 am MST
5:00 pm IST
4:30 am MST
6:00 pm IST
5:30 am MST
7:00 pm IST
6:30 am MST
8:00 pm IST
7:30 am MST
9:00 pm IST
8:30 am MST
10:00 pm IST
9:30 am MST
11:00 pm IST
10:30 am MST

Scheduling between the two

There is no overlap between a nine-to-six working day in New Delhi and one in Denver — the gap is too wide. A call has to sit early or late for one side. Early morning in New Delhi is the usual compromise, since that is late afternoon or evening in Denver.

A note on IST: it can also mean Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1). This page means India Standard Time, which is what almost all searches for IST want.

India Standard Time (IST) is used in all of India and Sri Lanka, on a single UTC+5:30 offset with no daylight saving

Mountain Time (MST) is used in Salt Lake City, Albuquerque and Calgary. Arizona keeps MST all year and does not follow MDT.

Other conversions