Current Time in Tehran

--:--:--

IRST / IRDT

UTC+3:30 (IRST) / UTC+4:30 (IRDT)

IANA timezone database Updates every second DST aware

About the Tehran Time Zone

Timezone

IRST / IRDT

UTC Offset

UTC+3:30 (IRST) / UTC+4:30 (IRDT)

Region

Middle East

Daylight Saving

Yes

Daylight Saving Time in Tehran

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.

Compare Time Differences

Need to compare the time between Tehran and another city? Our time difference calculator instantly shows the gap between Tehran and any location worldwide. You can also use our meeting planner to find the best time for everyone.

Instantly compare Tehran with any city worldwide — accounting for daylight saving time.

Compare time zones → Plan a meeting →

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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).