IRST to MST
Convert Iran Time — Tehran to Mountain Time — Denver — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Tehran, it's 11:30 PM in Denver the previous day. Denver is 9½ hours behind Tehran. Use the converter above to turn any IRST time into MST, or scan the hour-by-hour table below for the full day.
IRST to MST at a glance
Planning a meeting between Tehran and Denver
Tehran and Denver share no standard 9-to-5 overlap, so a live call usually means one side taking an early-morning or late-evening slot. The hourly table below helps you pick the least-inconvenient time for everyone.
Hour-by-hour: Tehran to Denver
A full day mapped from IRST to MST.
Frequently asked
Is Denver ahead of or behind Tehran?
Denver is 9½ hours behind Tehran.
What is 12:00 PM IRST in MST?
12:00 PM in Tehran is 2:30 AM in Denver.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so IRST and MST automatically reflect the correct daylight-saving offset for the current date.