Iran observes daylight saving time, moving clocks forward around March 22 and back in late September.
About Tehran
Tehran is the capital of Iran and a major city in the Middle East. It uses a unique UTC+3:30 offset — one of the few countries with a half-hour timezone.
Tehran's unique timezone is important for business with Iran and Iranian diaspora communities worldwide.
Frequently Asked Questions
What time zone is Tehran in?+
Tehran is in Iran Standard Time (IRST, UTC+3:30) in winter and Iran Daylight Time (IRDT, UTC+4:30) in summer.
Why does Tehran have a half-hour timezone?+
Iran uses a 30-minute offset (UTC+3:30) to better align with its geographic centre.
Does Tehran observe daylight saving time?+
Yes. Iran changes clocks around the Persian New Year (Nowruz) in late March and back in late September.
How many hours ahead of London is Tehran?+
Tehran is 3.5 hours ahead of London in winter (GMT).
What is IRST?+
IRST stands for Iran Standard Time (UTC+3:30).
What time is it in Tehran now?
The current local time in Tehran is displayed above and updates every second. Tehran is in the Iran Standard Time / Iran Daylight Time (IRST / IRDT), UTC offset UTC+3:30 (IRST) / UTC+4:30 (IRDT).
What time zone is Tehran in?
Tehran is in Iran Standard Time / Iran Daylight Time (IRST / IRDT). The UTC offset is UTC+3:30 (IRST) / UTC+4:30 (IRDT).