There are no overlapping standard business hours (9am - 5pm). Use the interactive converter above to visually compare hours side by side.

San Francisco

PST (GMT-8)

PDT starts on Mar 14, 2027

Tehran

IRST (GMT+3:30)

No Daylight Saving Time

What is the best time to schedule a meeting between San Francisco and Tehran?

There are no overlapping business hours. Consider early morning or late evening meetings, or use the interactive converter on this page to find a workable time slot.

How many hours apart are San Francisco and Tehran?

Tehran is 11.5 hours ahead of San Francisco.

Does the overlap change with daylight saving time?

San Francisco observes daylight saving time (PDT starts on Mar 14, 2027) but Tehran does not, so the overlap may shift by an hour seasonally. The interactive converter on this page always reflects the current offset, even across daylight saving transition.