Time difference between Istanbul and Tehran
Tehran is 30 minutes ahead of Istanbul. When it's 9:00 in Istanbul, it's 09:30 in Tehran.
Tehran is 30 minutes ahead of Istanbul.
On Saturday, 3 October 2026, 09:00 in Istanbul is 09:30 in Tehran. Istanbul is UTC+3; Tehran is UTC+3:30.
The gap through 2026
It stays 30 minutes all year — neither city changes its clocks against the other.
Istanbul to Tehran, hour by hour
On Monday 5 October.
| Istanbul | Tehran |
|---|---|
| 07:00 Early morning | 07:30 Early morning |
| 08:00 Early morning | 08:30 Early morning |
| 09:00 Working hours | 09:30 Working hours |
| 10:00 Working hours | 10:30 Working hours |
| 11:00 Working hours | 11:30 Working hours |
| 12:00 Working hours | 12:30 Working hours |
| 13:00 Working hours | 13:30 Working hours |
| 14:00 Working hours | 14:30 Working hours |
| 15:00 Working hours | 15:30 Working hours |
| 16:00 Working hours | 16:30 Working hours |
| 17:00 Evening | 17:30 Evening |
| 18:00 Evening | 18:30 Evening |
| 19:00 Evening | 19:30 Evening |
| 20:00 Evening | 20:30 Evening |
| 21:00 Evening | 21:30 Evening |
| 22:00 Sleeping hours | 22:30 Sleeping hours |
Daylight saving in 2026
Neither Istanbul nor Tehran changes its clocks, so the difference is the same all year.
Best times for a call
Working hours (09:00–17:00) overlap for 7 hours 30 minutes: 09:00–16:30 in Istanbul, which is 09:30–17:00 in Tehran.
- Istanbul 09:00Working hoursTehran 09:30Working hours
- Istanbul 10:00Working hoursTehran 10:30Working hours
- Istanbul 11:00Working hoursTehran 11:30Working hours
More time differences for Istanbul and Tehran
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- New York and Tehran
- Los Angeles and Tehran
- Chicago and Tehran
- London and Tehran
- Paris and Tehran
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- Denver and Istanbul
- Denver and Tehran
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- Toronto and Tehran
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- Mexico City and Tehran
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- Buenos Aires and Istanbul
- Buenos Aires and Tehran
- Bogotá and Istanbul
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- Dublin and Istanbul
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- Lisbon and Istanbul
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- Madrid and Istanbul
- Madrid and Tehran
How the time difference calculator works
The difference is each city's offset from UTC on the date you pick, subtracted. Offsets come from the IANA time zone database in your browser.
Because countries change their clocks on different dates — or not at all — the gap between two cities can change for a few weeks a year. The calculator lists every change in the year.
Examples
- London is 5 hours ahead of New York for most of the year, but only 4 hours ahead for about three weeks in March and one week in late October.
- Dubai doesn't change its clocks, so its gap to London is 4 hours in winter and 3 hours in summer.
Good for
- Knowing when a colleague's day starts
- Setting expectations for replies across time zones
- Planning travel and jet lag
Frequently asked questions
- What time is it in Tehran when it's 9 AM in Istanbul?
- 9:30 AM — as of 3 October 2026. Tehran is 30 minutes ahead of Istanbul.
- Does the time difference between Istanbul and Tehran change?
- No. It's 30 minutes all through 2026: neither city changes its clocks.
- What's the best time for a call between Istanbul and Tehran?
- Between 09:00 and 16:30 Istanbul time, when both cities are in working hours (09:00–17:00).
- What time zones are Istanbul and Tehran in?
- Istanbul uses Europe/Istanbul (UTC+3 today); Tehran uses Asia/Tehran (UTC+3:30 today).
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See everyone's local time as you schedule
Daykite converts every time in your calendar, so nobody gets an invite at 3 a.m.