IST to MST Converter
India Standard Time to US Mountain Time: live clocks, today's full conversion table, and the best hours to call. Daylight saving is handled automatically.
About IST and MST
India Standard Time (IST) is used across all of India, including Mumbai, Delhi, Bengaluru, Chennai and Kolkata. India does not observe daylight saving time.
US Mountain Time (MST/MDT) is used in Denver and Salt Lake City. Clocks shift to MDT from March to November. Note that Arizona stays on MST all year.
Time difference between IST and MST
MST is 12 hours 30 minutes behind IST in winter (January) and 11 hours 30 minutes behind IST in summer (July), because of daylight saving changes. The clocks and table above are computed live from the official IANA time zone database in your browser, so daylight saving transitions are always already included.
Best hours for meetings
Scan the table for rows where both sides land inside working hours (9:00 to 18:00). Rows where one side is early morning or late evening are workable for a quick call; avoid rows where either side is in the middle of the night. To line up three or more cities at once, use the time zone converter and meeting planner.
Related conversions
IST to EST IST to PST IST to CST IST to GMT IST to UTC IST to CET