Offset
The time difference between Iran Standard Time and Pacific Time is 10.5 hours.
Iran Standard Time (IRST) is ahead of Pacific Time (PDT).
IRST: UTC+3:30
PDT: UTC-7
Pacific Time is currently observing daylight saving time; Iran Standard Time is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Iran Standard Time and Pacific Time don't overlap on the same weekday. Pacific Time is 10 hours behind Iran Standard Time.
With some flexibility, there’s a workable window outside standard hours:
- 6 PM–8 PM in Iran Standard Time (7 AM–9 AM in Pacific Time) — suggest 7:00 PM Iran Standard Time (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
Iran Standard Time is also known as 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 Iran Standard Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| IRST | 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; Iran Standard Time 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
- 4:50 AM
- Sunset
- 7:18 PM
- Day length
- 14h 28m
- Sunrise
- 5:43 AM
- Sunset
- 8:02 PM
- Day length
- 14h 19m
Daylight overlap: 1h 42m — 4:50 AM–6:32 AM in Iran Standard Time (6:20 PM–8:02 PM 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 IRST in PST?
- 9:00 am IRST is 10:30 pm PST, the previous day.
- What is 12:00 pm IRST in PST?
- 12:00 pm IRST is 1:30 am PST.
- What is 12:30 pm IRST in PST?
- 12:30 pm IRST is 2:00 am PST.
- What is 2:00 pm IRST in PST?
- 2:00 pm IRST is 3:30 am PST.
- What is 5:00 pm IRST in PST?
- 5:00 pm IRST is 6:30 am PST.
- What is 11:30 pm IRST in PST?
- 11:30 pm IRST is 1:00 pm PST.