What time is it in Tehran when it's 9 AM in Dublin?

11:30 AM — as of 3 October 2026. Tehran is 2 hours 30 minutes ahead of Dublin.

Does the time difference between Dublin and Tehran change?

Yes. In 2026 it's 3 hours 30 minutes or 2 hours 30 minutes, depending on the date, because only Dublin changes its clocks.

What's the best time for a call between Dublin and Tehran?

Between 09:00 and 14:30 Dublin time, when both cities are in working hours (09:00–17:00).

What time zones are Dublin and Tehran in?

Dublin uses Europe/Dublin (UTC+1 today); Tehran uses Asia/Tehran (UTC+3:30 today).

Time difference between Dublin and Tehran

Tehran is 2 hours 30 minutes ahead of Dublin. When it's 9:00 in Dublin, it's 11:30 in Tehran.

From

Tehran is 2 hours 30 minutes ahead of Dublin.

On Saturday, 3 October 2026, 09:00 in Dublin is 11:30 in Tehran. Dublin is UTC+1; Tehran is UTC+3:30.

The gap through 2026

1 Jan – 29 MarTehran is 3 hours 30 minutes ahead of Dublin.
29 Mar – 25 OctTehran is 2 hours 30 minutes ahead of Dublin.
25 Oct – 31 DecTehran is 3 hours 30 minutes ahead of Dublin.

Dublin moves its clocks forward on 29 March (UTC → UTC+1).
Dublin moves its clocks back on 25 October (UTC+1 → UTC).

Dublin to Tehran, hour by hour

On Monday 5 October.

Dublin	Tehran
07:00 Early morning	09:30 Working hours
08:00 Early morning	10:30 Working hours
09:00 Working hours	11:30 Working hours
10:00 Working hours	12:30 Working hours
11:00 Working hours	13:30 Working hours
12:00 Working hours	14:30 Working hours
13:00 Working hours	15:30 Working hours
14:00 Working hours	16:30 Working hours
15:00 Working hours	17:30 Evening
16:00 Working hours	18:30 Evening
17:00 Evening	19:30 Evening
18:00 Evening	20:30 Evening
19:00 Evening	21:30 Evening
20:00 Evening	22:30 Sleeping hours
21:00 Evening	23:30 Sleeping hours
22:00 Sleeping hours	00:30+1 Sleeping hours

Daylight saving in 2026

Dublin moves its clocks forward on Sunday 29 March (UTC → UTC+1).
Dublin moves its clocks back on Sunday 25 October (UTC+1 → UTC).

1 Jan – 29 MarTehran is 3 hours 30 minutes ahead of Dublin.
29 Mar – 25 OctTehran is 2 hours 30 minutes ahead of Dublin.
25 Oct – 31 DecTehran is 3 hours 30 minutes ahead of Dublin.

Best times for a call

Working hours (09:00–17:00) overlap for 5 hours 30 minutes: 09:00–14:30 in Dublin, which is 11:30–17:00 in Tehran.

Dublin 09:00Working hoursTehran 11:30Working hours
Dublin 10:00Working hoursTehran 12:30Working hours
Dublin 11:00Working hoursTehran 13:30Working hours

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 Dublin?: 11:30 AM — as of 3 October 2026. Tehran is 2 hours 30 minutes ahead of Dublin.
Does the time difference between Dublin and Tehran change?: Yes. In 2026 it's 3 hours 30 minutes or 2 hours 30 minutes, depending on the date, because only Dublin changes its clocks.
What's the best time for a call between Dublin and Tehran?: Between 09:00 and 14:30 Dublin time, when both cities are in working hours (09:00–17:00).
What time zones are Dublin and Tehran in?: Dublin uses Europe/Dublin (UTC+1 today); Tehran uses Asia/Tehran (UTC+3:30 today).

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