MST to IRST
Convert Mountain Time — Denver to Iran Time — Tehran — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Denver, it's 6:30 PM in Tehran. Tehran is 9½ hours ahead of Denver. Use the converter above to turn any MST time into IRST, or scan the hour-by-hour table below for the full day.
MST to IRST at a glance
Planning a meeting between Denver and Tehran
Denver and Tehran 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: Denver to Tehran
A full day mapped from MST to IRST.
Frequently asked
Is Tehran ahead of or behind Denver?
Tehran is 9½ hours ahead of Denver.
What is 12:00 PM MST in IRST?
12:00 PM in Denver is 9:30 PM in Tehran.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so MST and IRST automatically reflect the correct daylight-saving offset for the current date.