Iran operates on IRST (UTC+3:30) in winter and IRDT (UTC+4:30) during summer โ one of the few countries with a 30-minute offset.
Tehran, Isfahan and Shiraz all share the same timezone. Iran is 3.5 hours ahead of London in winter.
Clocks move forward in late March and back in late September.
Common questions about time in Iran.
Check the current time in other major cities around the world.