Updated Mar 2026

Current Time in Iran

Q: What time is it in Iran right now?

Iran spans 1 timezone: IRST. Use the live clocks on this page for the exact local time in each major city.

Q: How many timezones does Iran have?

Iran uses 1 timezone: IRST. Not all regions observe daylight saving time on the same schedule.

Q: Does Iran observe daylight saving time?

DST rules vary by region within Iran. The live timezone badge next to each city clock on this page reflects the current offset — whether standard or daylight saving time is active right now.

Q: When is the best time to call someone in Iran?

Aim for 9:00 AM to 5:00 PM local time in the specific city you are calling. Because Iran spans 1 timezone, the right call window depends on the city, not just the country. Use the Best Time to Call calculator for an exact overlap window.

Live clocks for every Iran city — UTC offsets, DST status, and inter-city time gaps.

Tehran, Iran

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IRST No DST

Full Tehran Details

Iran's Timezone System Explained

Iran uses Iran Standard Time (IRST, UTC+3:30) in winter and Iran Daylight Time (IRDT, UTC+4:30) in summer. The half-hour offset is one of the most distinctive timezone characteristics in the Middle East — shared only with a small number of other countries globally.

DST in 2025: clocks spring forward one hour at midnight on the first day of Farvardin (approximately 21–22 March, the Persian New Year / Nowruz) and fall back at midnight on the first day of Mehr (approximately 22–23 September). The exact dates follow the Iranian Solar Hijri calendar.

Tehran, Isfahan, Mashhad, Shiraz, and Tabriz all use IRST/IRDT. Key differences: Dubai (GST, UTC+4) is 30 minutes ahead of Iran in winter. Karachi (PKT, UTC+5) is 1.5 hours ahead. London (GMT) is 3.5 hours behind in winter.

Iran Cities by Timezone

1 timezone · 3 cities · live times

IRST

3 cities

Time differences may shift seasonally when cities observe different daylight saving schedules.

Reviewed by iFormat Time Tools Team Last updated Mar 7, 2026

Country timezone data, DST policies, and city assignments verified against the IANA Time Zone Database (tzdata). Updated whenever DST rules or political boundaries change.

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Frequently Asked Questions

Timezones, DST rules, and scheduling in Iran

What time is it in Iran right now?

Iran spans 1 timezone — IRST — so there is no single answer. The live clocks above show the exact time in Tehran, Mashhad, Isfahan.

How many timezones does Iran have?

Iran uses a single timezone: IRST. The whole country follows the same clock year-round.

Does Iran observe daylight saving time?

DST rules in Iran depend on the specific region. The live timezone badge next to each city clock on this page always reflects the current offset — whether standard or daylight saving time is active right now.

Why does Iran use a half-hour timezone?

Iran Standard Time (IRST, UTC+3:30) was adopted to more closely match the country's solar noon. Tehran sits at roughly 51.5°E longitude, giving a natural solar offset close to UTC+3:26. The UTC+3:30 compromise balances geographic accuracy with administrative practicality.

What is the time difference between Iran and the UK?

Tehran (IRST, UTC+3:30) is 3 hours 30 minutes ahead of London (GMT) in winter. During Iranian summer (IRDT, UTC+4:30), Tehran is 4 hours 30 minutes ahead of GMT and 3 hours 30 minutes ahead of BST.

Does Iran observe daylight saving time?

Yes. Iran observes DST — clocks move from IRST (UTC+3:30) to IRDT (UTC+4:30) in late March (around Nowruz, the Persian New Year) and fall back in late September, broadly aligned with the astronomical seasons.

When is the best time to call someone in Iran?

Aim for 9:00 AM – 5:00 PM local time in the specific city. Because Iran spans 1 timezones, the overlap window from your location differs between cities. Open any city page above for its full scheduling guide.

How accurate are the live clocks on this page?

All clocks update every second using your browser's timezone engine with current DST rules applied automatically. The displayed times match the official local time in each city — no manual refresh needed.