Offset
The time difference between Isfahan and Mountain Time is 9.5 hours.
Isfahan (IRST) is ahead of Mountain Time (MDT).
IRST: UTC+3:30
MDT: UTC-6
Mountain Time is currently observing daylight saving time; Isfahan is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Isfahan and Mountain Time don't overlap on the same weekday. Mountain Time is 9 hours behind Isfahan.
With some flexibility, there’s a workable window outside standard hours:
- 5 PM–8 PM in Isfahan (7 AM–10 AM in Mountain Time) — suggest 6:00 PM Isfahan (8:30 AM Mountain Time).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Isfahan uses Iran Standard Time (IRST). To call Iran, dial +98.
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Mountain Time is approximately 7,200 miles north of Isfahan.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Isfahan | MST | Day |
|---|---|---|
| 12:00 am | 2:30 pm | -1 day |
| 1:00 am | 3:30 pm | -1 day |
| 2:00 am | 4:30 pm | -1 day |
| 3:00 am | 5:30 pm | -1 day |
| 4:00 am | 6:30 pm | -1 day |
| 5:00 am | 7:30 pm | -1 day |
| 6:00 am | 8:30 pm | -1 day |
| 7:00 am | 9:30 pm | -1 day |
| 8:00 am | 10:30 pm | -1 day |
| 9:00 am | 11:30 pm | -1 day |
| 10:00 am | 12:30 am | Same day |
| 11:00 am | 1:30 am | Same day |
| 12:00 pm | 2:30 am | Same day |
| 1:00 pm | 3:30 am | Same day |
| 2:00 pm | 4:30 am | Same day |
| 3:00 pm | 5:30 am | Same day |
| 4:00 pm | 6:30 am | Same day |
| 5:00 pm | 7:30 am | Same day |
| 6:00 pm | 8:30 am | Same day |
| 7:00 pm | 9:30 am | Same day |
| 8:00 pm | 10:30 am | Same day |
| 9:00 pm | 11:30 am | Same day |
| 10:00 pm | 12:30 pm | Same day |
| 11:00 pm | 1:30 pm | Same day |
Daylight saving time
Mountain Time observes daylight saving time; Isfahan does not. The offset between the two zones changes when Mountain Time transitions: on Sunday, November 1, 2026, clocks fall back from MDT to MST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:10 AM
- Sunset
- 7:11 PM
- Day length
- 14h 1m
- Sunrise
- 5:48 AM
- Sunset
- 8:25 PM
- Day length
- 14h 37m
Daylight overlap: 46m — 5:10 AM–5:55 AM in Isfahan (7:40 PM–8:25 PM in Mountain Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Mountain Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Iran Standard Time
- IKA
- THR
- MHD
- IFN
- PYK
- TBZ
Airports in Mountain Time
- BJC
- DEN
- OGD
- SLC
Related conversions
Common conversions
- What is 9:00 am Isfahan in MST?
- 9:00 am Isfahan is 11:30 pm MST, the previous day.
- What is 12:00 pm Isfahan in MST?
- 12:00 pm Isfahan is 2:30 am MST.
- What is 12:30 pm Isfahan in MST?
- 12:30 pm Isfahan is 3:00 am MST.
- What is 2:00 pm Isfahan in MST?
- 2:00 pm Isfahan is 4:30 am MST.
- What is 5:00 pm Isfahan in MST?
- 5:00 pm Isfahan is 7:30 am MST.
- What is 11:30 pm Isfahan in MST?
- 11:30 pm Isfahan is 2:00 pm MST.