What time is it in Seoul when it's 9 AM in Athens?

3:00 PM — as of 6 October 2026. Seoul is 6 hours ahead of Athens.

Does the time difference between Athens and Seoul change?

Yes. In 2026 it's 7 hours or 6 hours, depending on the date, because only Athens changes its clocks.

What's the best time for a call between Athens and Seoul?

Between 09:00 and 11:00 Athens time, when both cities are in working hours (09:00–17:00).

What time zones are Athens and Seoul in?

Athens uses Europe/Athens (UTC+3 today); Seoul uses Asia/Seoul (UTC+9 today).

Time difference between Athens and Seoul

Seoul is 6 hours ahead of Athens. When it's 9:00 in Athens, it's 15:00 in Seoul.

From

Seoul is 6 hours ahead of Athens.

On Tuesday, 6 October 2026, 09:00 in Athens is 15:00 in Seoul. Athens is UTC+3; Seoul is UTC+9.

The gap through 2026

1 Jan – 29 MarSeoul is 7 hours ahead of Athens.
29 Mar – 25 OctSeoul is 6 hours ahead of Athens.
25 Oct – 31 DecSeoul is 7 hours ahead of Athens.

Athens moves its clocks forward on 29 March (UTC+2 → UTC+3).
Athens moves its clocks back on 25 October (UTC+3 → UTC+2).

Athens to Seoul, hour by hour

On Tuesday 6 October.

Athens	Seoul
07:00 Early morning	13:00 Working hours
08:00 Early morning	14:00 Working hours
09:00 Working hours	15:00 Working hours
10:00 Working hours	16:00 Working hours
11:00 Working hours	17:00 Evening
12:00 Working hours	18:00 Evening
13:00 Working hours	19:00 Evening
14:00 Working hours	20:00 Evening
15:00 Working hours	21:00 Evening
16:00 Working hours	22:00 Sleeping hours
17:00 Evening	23:00 Sleeping hours
18:00 Evening	00:00+1 Sleeping hours
19:00 Evening	01:00+1 Sleeping hours
20:00 Evening	02:00+1 Sleeping hours
21:00 Evening	03:00+1 Sleeping hours
22:00 Sleeping hours	04:00+1 Sleeping hours

Daylight saving in 2026

Athens moves its clocks forward on Sunday 29 March (UTC+2 → UTC+3).
Athens moves its clocks back on Sunday 25 October (UTC+3 → UTC+2).

1 Jan – 29 MarSeoul is 7 hours ahead of Athens.
29 Mar – 25 OctSeoul is 6 hours ahead of Athens.
25 Oct – 31 DecSeoul is 7 hours ahead of Athens.

Best times for a call

Working hours (09:00–17:00) overlap for 2 hours: 09:00–11:00 in Athens, which is 15:00–17:00 in Seoul.

Athens 07:00Early morningSeoul 13:00Working hours
Athens 09:00Working hoursSeoul 15:00Working hours
Athens 10:00Working hoursSeoul 16:00Working 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 Seoul when it's 9 AM in Athens?: 3:00 PM — as of 6 October 2026. Seoul is 6 hours ahead of Athens.
Does the time difference between Athens and Seoul change?: Yes. In 2026 it's 7 hours or 6 hours, depending on the date, because only Athens changes its clocks.
What's the best time for a call between Athens and Seoul?: Between 09:00 and 11:00 Athens time, when both cities are in working hours (09:00–17:00).
What time zones are Athens and Seoul in?: Athens uses Europe/Athens (UTC+3 today); Seoul uses Asia/Seoul (UTC+9 today).

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