Time difference between Colombo and Seoul
Seoul is 3 hours 30 minutes ahead of Colombo. When it's 9:00 in Colombo, it's 12:30 in Seoul.
Seoul is 3 hours 30 minutes ahead of Colombo.
On Wednesday, 7 October 2026, 09:00 in Colombo is 12:30 in Seoul. Colombo is UTC+5:30; Seoul is UTC+9.
The gap through 2026
It stays 3 hours 30 minutes all year — neither city changes its clocks against the other.
Colombo to Seoul, hour by hour
On Wednesday 7 October.
| Colombo | Seoul |
|---|---|
| 07:00 Early morning | 10:30 Working hours |
| 08:00 Early morning | 11:30 Working hours |
| 09:00 Working hours | 12:30 Working hours |
| 10:00 Working hours | 13:30 Working hours |
| 11:00 Working hours | 14:30 Working hours |
| 12:00 Working hours | 15:30 Working hours |
| 13:00 Working hours | 16:30 Working hours |
| 14:00 Working hours | 17:30 Evening |
| 15:00 Working hours | 18:30 Evening |
| 16:00 Working hours | 19:30 Evening |
| 17:00 Evening | 20:30 Evening |
| 18:00 Evening | 21:30 Evening |
| 19:00 Evening | 22:30 Sleeping hours |
| 20:00 Evening | 23:30 Sleeping hours |
| 21:00 Evening | 00:30+1 Sleeping hours |
| 22:00 Sleeping hours | 01:30+1 Sleeping hours |
Daylight saving in 2026
Neither Colombo nor Seoul changes its clocks, so the difference is the same all year.
Best times for a call
Working hours (09:00–17:00) overlap for 4 hours 30 minutes: 09:00–13:30 in Colombo, which is 12:30–17:00 in Seoul.
- Colombo 09:00Working hoursSeoul 12:30Working hours
- Colombo 10:00Working hoursSeoul 13:30Working hours
- Colombo 11:00Working hoursSeoul 14:30Working hours
More time differences for Colombo and Seoul
- New York and Seoul
- Los Angeles and Seoul
- Chicago and Seoul
- London and Seoul
- Paris and Seoul
- Berlin and Seoul
- New York and Colombo
- Los Angeles and Colombo
- Chicago and Colombo
- London and Colombo
- Paris and Colombo
- Berlin and Colombo
- Denver and Colombo
- Denver and Seoul
- Toronto and Colombo
- Toronto and Seoul
- Vancouver and Colombo
- Vancouver and Seoul
- Mexico City and Colombo
- Mexico City and Seoul
- São Paulo and Colombo
- São Paulo and Seoul
- Buenos Aires and Colombo
- Buenos Aires and Seoul
- Bogotá and Colombo
- Bogotá and Seoul
- Dublin and Colombo
- Dublin and Seoul
- Lisbon and Colombo
- Lisbon and Seoul
- Madrid and Colombo
- Madrid and Seoul
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 Colombo?
- 12:30 PM — as of 7 October 2026. Seoul is 3 hours 30 minutes ahead of Colombo.
- Does the time difference between Colombo and Seoul change?
- No. It's 3 hours 30 minutes all through 2026: neither city changes its clocks.
- What's the best time for a call between Colombo and Seoul?
- Between 09:00 and 13:30 Colombo time, when both cities are in working hours (09:00–17:00).
- What time zones are Colombo and Seoul in?
- Colombo uses Asia/Colombo (UTC+5:30 today); Seoul uses Asia/Seoul (UTC+9 today).
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