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

New York City

EST (GMT-5)

EDT starts on Mar 14, 2027

Tehran

IRST (GMT+3:30)

No Daylight Saving Time

What is the best time to schedule a meeting between New York City 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 New York City and Tehran?

Tehran is 8.5 hours ahead of New York City.

Does the overlap change with daylight saving time?

New York City observes daylight saving time (EDT 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.