MDT to IRST Time Converter
Use this MDT to IRST time converter to compare US Mountain and Iran time instantly. IRST is 9 hours and 30 minutes ahead of MDT, so 9:00 AM MDT becomes 6:30 PM IRST and 5:00 PM MDT becomes 2:30 AM (next day) IRST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
MDT to IRST Quick Facts
Use this MDT to IRST converter to compare US Mountain and Iran time, check the 9 hours and 30 minutes gap, and confirm the right slot for calls, handoffs, and deadlines. Find the best overlap for calls and meetings.
How to Convert MDT to IRST
Converting between Mountain Daylight Time and Iran Standard Time means accounting for a 9 hours and 30 minutes gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Mountain Daylight Time (UTC -6) that you want to convert. Hit "Now" to load the current MDT time instantly, or use "+1h" to step forward and compare.
The equivalent Iran Standard Time (UTC +3:30) time appears immediately. Since IRST is 9 hours and 30 minutes ahead of MDT, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the IRST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
Why Choose Our MDT to IRST Converter
With 9 hours and 30 minutes between MDT and IRST, business-hours overlap is limited. This tool instantly shows which hours work on both sides, so you can lock in a meeting without a chain of "does 3 PM work for you?" emails.
Late-night MDT times can land on a different date in IRST because of the 9 hours and 30 minutes offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
The half-hour offset between MDT (UTC -6) and IRST (UTC +3:30) already makes mental math tricky — add Daylight Saving Time and the gap can shift further. This converter uses live UTC offsets, so you're always accurate.
Product launches, sports matches, and webinars are often announced in MDT. Convert the event time to IRST so you know exactly when to tune in — with a 9 hours and 30 minutes difference, a morning event in United States falls during work hours in Iran.
MDT to IRST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Mountain Daylight Time to Iran Standard Time full day schedule
| Mountain Daylight Time | Iran Standard Time |
|---|---|
| 12:00 AM |
9:30 AM
|
| 1:00 AM |
10:30 AM
|
| 2:00 AM |
11:30 AM
|
| 3:00 AM |
12:30 PM
|
| 4:00 AM |
1:30 PM
|
| 5:00 AM |
2:30 PM
|
| 6:00 AM |
3:30 PM
|
| 7:00 AM |
4:30 PM
|
| 8:00 AM |
5:30 PM
|
| 9:00 AM |
6:30 PM
|
| 10:00 AM |
7:30 PM
|
| 11:00 AM |
8:30 PM
|
| 12:00 PM |
9:30 PM
|
| 1:00 PM |
10:30 PM
|
| 2:00 PM |
11:30 PM
|
| 3:00 PM |
12:30 AM
(next day)
|
| 4:00 PM |
1:30 AM
(next day)
|
| 5:00 PM |
2:30 AM
(next day)
|
| 6:00 PM |
3:30 AM
(next day)
|
| 7:00 PM |
4:30 AM
(next day)
|
| 8:00 PM |
5:30 AM
(next day)
|
| 9:00 PM |
6:30 AM
(next day)
|
| 10:00 PM |
7:30 AM
(next day)
|
| 11:00 PM |
8:30 AM
(next day)
|
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