Tehran, Iran · UTC+3:30
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Tehran is a city of nearly 9 million people (metropolitan area approximately 16.8 million)[3] in a bowl ringed by the Alborz Mountains, and it runs on one of the world’s more unusual clocks. Iran Standard Time sits at UTC+3:30, a half-hour offset that puts Tehran 30 minutes out of step with both its immediate neighbors and the usual whole-hour timezone grid.
The offset has historical roots. Iran set its standard time based on the meridian running through Tehran, which falls near 52.5 degrees east longitude, the midpoint between UTC+3 and UTC+4. Rather than round to a whole hour, Iran kept the half-hour. The tradition survived the Islamic Revolution and remains today.
Nowruz and the Persian calendar
Iran abolished daylight saving time in September 2022 and now observes UTC+3:30 year-round.[4]
Tehran’s morning rush begins early by regional standards. The city’s traffic density, among the worst in the world, means commuters allow enormous time buffers. The actual hour of departure often matters less than the estimated hours of delay.
9am in Tehran is 5:30am in London. Isfahan shares Iran Standard Time.
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Questions about time in Tehran
- What timezone is Tehran in?
- Tehran uses the IANA timezone
Asia/Tehran. The UTC offset is always UTC+3:30 - this timezone does not observe daylight saving time. - Does Tehran observe daylight saving time?
- No. Tehran does not observe daylight saving time. The UTC offset remains UTC+3:30 all year round.
- What is the current UTC offset for Tehran?
- Tehran is currently at UTC+3:30.
- What is the time difference between Tehran and New York?
- Tehran is currently 7 hours 30 minutes ahead of New York.
- What is the time difference between Tehran and London?
- Tehran is currently 2 hours 30 minutes ahead of London.
- What is the time difference between Tehran and Los Angeles?
- Tehran is currently 10 hours 30 minutes ahead of Los Angeles.
- What is the time difference between Tehran and Tokyo?
- Tehran is currently 5 hours 30 minutes behind Tokyo.
- What is the IANA timezone name for Tehran?
- The IANA timezone database identifier for Tehran is
Asia/Tehran. Use this string in programming languages and APIs: JavaScript (`new Intl.DateTimeFormat('en-US', { timeZone: 'Asia/Tehran' })`), Python (`pytz.timezone('Asia/Tehran')`), or any IANA-compatible library.
Frequently Asked Questions
What timezone is Tehran in?
Tehran uses the IANA timezone Asia/Tehran. The UTC offset is always UTC+3:30 - this timezone does not observe daylight saving time.
Does Tehran observe daylight saving time?
No. Tehran does not observe daylight saving time. The UTC offset remains UTC+3:30 all year round.
What is the current UTC offset for Tehran?
Tehran is currently at UTC+3:30.
What is the time difference between Tehran and New York?
Tehran is currently 7 hours 30 minutes ahead of New York.
What is the time difference between Tehran and London?
Tehran is currently 2 hours 30 minutes ahead of London.