Offset
The time difference between Tehran and Pacific Time is 10.5 hours.
Tehran (IRST) is ahead of Pacific Time (PDT).
IRST: UTC+3:30
PDT: UTC-7
Pacific Time is currently observing daylight saving time; Tehran is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Tehran and Pacific Time don't overlap on the same weekday. Pacific Time is 10 hours behind Tehran.
With some flexibility, there’s a workable window outside standard hours:
- 6 PM–8 PM in Tehran (7 AM–9 AM in Pacific Time) — suggest 7:00 PM Tehran (8:30 AM Pacific 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
Tehran uses Iran Standard Time (IRST). To call Iran, dial +98.
Pacific Time is also known as PST, or PDT. To call United States, dial +1.
Pacific Time is approximately 7,550 miles north of Tehran.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Tehran | PST | Day |
|---|---|---|
| 12:00 am | 1:30 pm | -1 day |
| 1:00 am | 2:30 pm | -1 day |
| 2:00 am | 3:30 pm | -1 day |
| 3:00 am | 4:30 pm | -1 day |
| 4:00 am | 5:30 pm | -1 day |
| 5:00 am | 6:30 pm | -1 day |
| 6:00 am | 7:30 pm | -1 day |
| 7:00 am | 8:30 pm | -1 day |
| 8:00 am | 9:30 pm | -1 day |
| 9:00 am | 10:30 pm | -1 day |
| 10:00 am | 11:30 pm | -1 day |
| 11:00 am | 12:30 am | Same day |
| 12:00 pm | 1:30 am | Same day |
| 1:00 pm | 2:30 am | Same day |
| 2:00 pm | 3:30 am | Same day |
| 3:00 pm | 4:30 am | Same day |
| 4:00 pm | 5:30 am | Same day |
| 5:00 pm | 6:30 am | Same day |
| 6:00 pm | 7:30 am | Same day |
| 7:00 pm | 8:30 am | Same day |
| 8:00 pm | 9:30 am | Same day |
| 9:00 pm | 10:30 am | Same day |
| 10:00 pm | 11:30 am | Same day |
| 11:00 pm | 12:30 pm | Same day |
Daylight saving time
Pacific Time observes daylight saving time; Tehran does not. The offset between the two zones changes when Pacific Time transitions: on Sunday, November 1, 2026, clocks fall back from PDT to PST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:07 AM
- Sunset
- 7:16 PM
- Day length
- 14h 8m
- Sunrise
- 6:00 AM
- Sunset
- 8:00 PM
- Day length
- 14h
Daylight overlap: 2h 46m — 4:30 PM–7:16 PM in Tehran (6:00 AM–8:46 AM in Pacific Time). Both locations are in daylight during this window.
Cities in these zones
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 Pacific Time
- BUR
- HHR
- LAX
- LGB
- SNA
- CLD
- SAN
- TIJ
- OAK
- SFO
Related conversions
Common conversions
- What is 9:00 am Tehran in PST?
- 9:00 am Tehran is 10:30 pm PST, the previous day.
- What is 12:00 pm Tehran in PST?
- 12:00 pm Tehran is 1:30 am PST.
- What is 12:30 pm Tehran in PST?
- 12:30 pm Tehran is 2:00 am PST.
- What is 2:00 pm Tehran in PST?
- 2:00 pm Tehran is 3:30 am PST.
- What is 5:00 pm Tehran in PST?
- 5:00 pm Tehran is 6:30 am PST.
- What is 11:30 pm Tehran in PST?
- 11:30 pm Tehran is 1:00 pm PST.