What time zone does Tehran use?

Tehran uses Iran Standard Time (IRST, UTC+3:30) in winter and Iran Daylight Time (IRDT, UTC+4:30) during summer daylight saving time. Iran is one of the few countries with a 30-minute offset from UTC.

Does Iran observe daylight saving time?

Yes. Iran shifts clocks forward by one hour in late March (around Nowruz, the Persian New Year) and back in late September. The exact dates follow the Iranian Solar Hijri calendar rather than a fixed Gregorian date.

Is this clock accurate?

The accuracy depends on your device's system clock. If your device is synced to NTP (which all modern phones and computers are by default), the displayed time will be accurate to within a second.

What is the difference between IRST and IRDT?

IRST (Iran Standard Time) is UTC+3:30 and is used in winter. IRDT (Iran Daylight Time) is UTC+4:30 and is used in summer. The difference between them is exactly one hour.

How do I convert Tehran time to my local time?

Your local time is shown below the Tehran clock. You can subtract or add the displayed UTC offset difference between Tehran and your own timezone to compute the gap.

Current Time in Tehran

Name: Current Time in Tehran
Availability: InStock
Author: Nham Vu

See the exact current time in Tehran, Iran with live updates, UTC offset, and daylight saving status.

Tehran, Iran

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UTC+?:?? -- Time

Your Local Time

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UTC+?:?? --

Tehran is ... hours ahead of your local time.

Summary

See the exact current time in Tehran, Iran with live updates, UTC offset, and daylight saving status.

How it works

Your browser reads its system clock in real time.
The Intl.DateTimeFormat API converts the UTC timestamp to the Asia/Tehran timezone.
The clock display updates every second via a JavaScript interval.
UTC offset and DST status are derived from the computed offset difference.
No data is sent to any server — everything runs client-side.

Use cases

Schedule calls or meetings with colleagues in Tehran.
Check whether Tehran business hours are currently active.
Verify the UTC offset before sending a time-sensitive message.
Confirm whether Iran is currently on standard or daylight saving time.
Calculate time differences between Tehran and your local time zone.
Plan travel or event timing involving Iran.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu