World Timezones

Colombo to Seoul Converter

Compare Seoul to Colombo instead
Colombo7:59 amMon, Jun 8
ColomboIST
Sri Lanka · UTC+5:30
7:59 amMon, Jun 8
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
SeoulKST
South Korea · UTC+9
11:29 amMon, Jun 8
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a

Offset

The time difference between Colombo and Seoul is 3.5 hours.

3.5 hours

Colombo (IST) is behind Seoul (KST).

IST: UTC+5:30

KST: UTC+9

Neither Colombo nor Seoul is currently observing daylight saving time.

When to schedule

Business-hours overlap: 9 AM–2 PM in Colombo (12 PM–5 PM in Seoul).

Both teams are in working hours during this window on weekdays.

Suggested time: 11:00 AM Colombo (2:30 PM Seoul).

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

South Korea

  • New Year's DayThu, Jan 1
  • Lunar New YearMon, Feb 16
  • Lunar New YearTue, Feb 17
  • Lunar New YearWed, Feb 18
  • Independence Movement DayMon, Mar 2
  • Labour DayFri, May 1
  • Children's DayTue, May 5
  • Buddha's BirthdayMon, May 25
  • Local Election DayWed, Jun 3
  • Memorial DaySat, Jun 6
  • Constitution DayFri, Jul 17
  • Liberation DayMon, Aug 17
  • ChuseokThu, Sep 24
  • ChuseokFri, Sep 25
  • ChuseokSat, Sep 26
  • National Foundation DayMon, Oct 5
  • Hangul DayFri, Oct 9
  • Christmas DayFri, Dec 25

About these zones

Colombo uses India Standard Time (IST). To call Sri Lanka, dial +94.

Seoul uses Korea Standard Time (KST). To call South Korea, dial +82.

Seoul is approximately 3,650 miles northeast of Colombo.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

ColomboSeoulDay
12:00 am3:30 amSame day
1:00 am4:30 amSame day
2:00 am5:30 amSame day
3:00 am6:30 amSame day
4:00 am7:30 amSame day
5:00 am8:30 amSame day
6:00 am9:30 amSame day
7:00 am10:30 amSame day
8:00 am11:30 amSame day
9:00 am12:30 pmSame day
10:00 am1:30 pmSame day
11:00 am2:30 pmSame day
12:00 pm3:30 pmSame day
1:00 pm4:30 pmSame day
2:00 pm5:30 pmSame day
3:00 pm6:30 pmSame day
4:00 pm7:30 pmSame day
5:00 pm8:30 pmSame day
6:00 pm9:30 pmSame day
7:00 pm10:30 pmSame day
8:00 pm11:30 pmSame day
9:00 pm12:30 am+1 day
10:00 pm1:30 am+1 day
11:00 pm2:30 am+1 day

Daylight saving time

Neither Colombo nor Seoul observes daylight saving time. The offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Colombo
Sunrise
5:55 AM
Sunset
6:26 PM
Day length
12h 31m
Seoul
Sunrise
5:12 AM
Sunset
7:52 PM
Day length
14h 41m

Daylight overlap: 10h 27m — 5:55 AM–4:22 PM in Colombo (9:25 AM–7:52 PM in Seoul). Both locations are in daylight during this window.

Cities in these zones

Other cities in Korea Standard Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in India Standard Time

  • CMB
  • RML

Airports in Korea Standard Time

  • GMP
  • ICN
  • PUS
  • TAE
  • CJJ
  • KWJ
  • MWX

Related conversions

Common conversions

What is 9:00 am Colombo in Seoul?
9:00 am Colombo is 12:30 pm Seoul.
What is 12:00 pm Colombo in Seoul?
12:00 pm Colombo is 3:30 pm Seoul.
What is 12:30 pm Colombo in Seoul?
12:30 pm Colombo is 4:00 pm Seoul.
What is 2:00 pm Colombo in Seoul?
2:00 pm Colombo is 5:30 pm Seoul.
What is 5:00 pm Colombo in Seoul?
5:00 pm Colombo is 8:30 pm Seoul.
What is 11:30 pm Colombo in Seoul?
11:30 pm Colombo is 3:00 am Seoul, the next day.