MST to IST Converter

Mountain Standard Time → India Standard Time · MST is 12.5 hours behind IST

MST
—
IST
—

MST and IST are the same time

MST to IST Conversion Table

MSTIST
12:00 AM12:00 AM
1:00 AM1:00 AM
2:00 AM2:00 AM
3:00 AM3:00 AM
4:00 AM4:00 AM
5:00 AM5:00 AM
6:00 AM6:00 AM
7:00 AM7:00 AM
8:00 AM8:00 AM
9:00 AM9:00 AM
10:00 AM10:00 AM
11:00 AM11:00 AM
12:00 PM12:00 PM
1:00 PM1:00 PM
2:00 PM2:00 PM
3:00 PM3:00 PM
4:00 PM4:00 PM
5:00 PM5:00 PM
6:00 PM6:00 PM
7:00 PM7:00 PM
8:00 PM8:00 PM
9:00 PM9:00 PM
10:00 PM10:00 PM
11:00 PM11:00 PM

Green rows = business hours overlap (9:00 AM – 6:00 PM MST)

Major MST Cities
  • Denver, CO
  • Phoenix, AZ
  • Salt Lake City, UT
  • Albuquerque, NM
  • Tucson, AZ
  • Boise, ID
Major IST Cities
  • Mumbai
  • Delhi
  • Bangalore
  • Hyderabad
  • Chennai
  • Kolkata
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MST vs IST — What You Need to Know

Mountain Standard Time (MST) is UTC-7. Colorado, Utah, New Mexico, and Idaho observe MDT (UTC-6) from the second Sunday in March to the first Sunday in November. Arizona stays on MST year-round (no DST).

India Standard Time (IST) is UTC+5:30. India never observes daylight saving time — IST is fixed year-round.

The 12.5-hour gap means the practical overlap window is narrow: 7:00–9:30 AM MST = 7:30–10:00 PM IST. During MDT (summer), the window improves: 7:00 AM MDT = 6:30 PM IST — a more reasonable India evening slot.

Arizona's year-round MST means Phoenix businesses always deal with a fixed 12.5-hour gap to India, unlike Denver which benefits from the MDT narrowing in summer.

Arizona exception:

Phoenix stays on MST (UTC-7) all year. Denver/Salt Lake switch to MDT (UTC-6) in summer → gap becomes 11.5h. India stays at UTC+5:30 year-round.

Frequently Asked Questions

How many hours behind is MST compared to IST?

MST (UTC-7) is 12 hours and 30 minutes behind IST (UTC+5:30) during US standard time. When the US observes MDT (UTC-6, March–November), the gap narrows to 11 hours and 30 minutes. Note: Arizona observes MST year-round and does not switch to MDT.

When it is 9:00 AM MST, what time is it in India?

When it is 9:00 AM MST (UTC-7), it is 9:30 PM IST the same day. During MDT (UTC-6), 9:00 AM MDT = 8:30 PM IST. Denver and Salt Lake City mornings correspond to India late evening.

What is the best time for a call between Denver and India?

The best overlap is 7:00–9:30 AM MST, which corresponds to 7:30–10:00 PM IST — within Indian evening working hours. During MDT (summer), 7:00 AM MDT = 6:30 PM IST, giving a more comfortable India-side window. Avoid calls after 10:00 AM MST as India will be past 10:30 PM.

Is MST 12 or 13 hours behind IST?

MST (UTC-7) is 12 hours and 30 minutes (12.5 hours) behind IST (UTC+5:30). The half-hour comes from India's UTC+5:30 offset. During US daylight saving time (MDT, UTC-6), the gap is 11 hours and 30 minutes (11.5 hours). Phoenix (Arizona) stays on MST year-round, so the gap for Phoenix is always 12.5 hours.

Does Arizona observe daylight saving time?

No. Arizona (except the Navajo Nation) does not observe daylight saving time and stays on MST (UTC-7) year-round. This means Arizona is always 12.5 hours behind IST, while Denver and Salt Lake City alternate between 12.5h (winter) and 11.5h (summer).