PST to IRST
Converting a fixed time. America/Los_Angeles → Asia/Tehran
Clocks go back 1 hour on Sunday, 1st November 2026, at 1:59 am local time (1:00 am after the change).
Clocks here do not change — this zone stays on the same offset all year.
Convert a specific time minutes work, not just whole hours
Hour by hour
| PST | IRST | 24h | Good to call? |
|---|---|---|---|
| 12am | 10am | 00:00 → 10:30 | asleep in PST |
| 1am | 11am | 01:00 → 11:30 | asleep in PST |
| 2am | 12pm | 02:00 → 12:30 | asleep in PST |
| 3am | 1pm | 03:00 → 13:30 | asleep in PST |
| 4am | 2pm | 04:00 → 14:30 | asleep in PST |
| 5am | 3pm | 05:00 → 15:30 | asleep in PST |
| 6am now | 4pm | 06:00 → 16:30 | asleep in PST |
| 7am | 5pm | 07:00 → 17:30 | awake, not at work |
| 8am | 6pm | 08:00 → 18:30 | awake, not at work |
| 9am | 7pm | 09:00 → 19:30 | awake, not at work |
| 10am | 8pm | 10:00 → 20:30 | awake, not at work |
| 11am | 9pm | 11:00 → 21:30 | awake, not at work |
| 12pm | 10pm | 12:00 → 22:30 | asleep in IRST |
| 1pm | 11pm | 13:00 → 23:30 | asleep in IRST |
| 2pm | 12am Fri | 14:00 → 00:30 | asleep in IRST |
| 3pm | 1am Fri | 15:00 → 01:30 | asleep in IRST |
| 4pm | 2am Fri | 16:00 → 02:30 | asleep in IRST |
| 5pm | 3am Fri | 17:00 → 03:30 | asleep in IRST |
| 6pm | 4am Fri | 18:00 → 04:30 | asleep in IRST |
| 7pm | 5am Fri | 19:00 → 05:30 | asleep in IRST |
| 8pm | 6am Fri | 20:00 → 06:30 | asleep in IRST |
| 9pm | 7am Fri | 21:00 → 07:30 | awake, not at work |
| 10pm | 8am Fri | 22:00 → 08:30 | asleep in PST |
| 11pm | 9am Fri | 23:00 → 09:30 | asleep in PST |
Call times
There is no hour when both places are inside normal working hours. The least bad slot is usually early morning at the western end.
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Questions people ask
What time is it in IRST when it is 12:00 pm in PST?
10:30 pm in IRST the same day.
How many hours ahead is IRST of PST?
IRST is 10 hours 30 minutes ahead PST. That gap is not fixed: it changes when either place starts or ends daylight saving. The table on this page is recalculated for today, so it is already correct for the current season.
What is the best time to call between PST and IRST?
There is no hour when both places are inside normal working hours. The least bad slot is usually early morning at the western end.
When does the difference between PST and IRST change?
PST: Clocks go back 1 hour on Sunday, 1st November 2026, at 1:59 am local time (1:00 am after the change). IRST does not change its clocks, so the gap shifts by an hour on that date.