World Timezones

KST to GMT Converter

Compare GMT to KST instead
Korea Standard Time1:36 pmFri, Jun 5
Korea Standard TimeKST
Asia · UTC+9
1:36 pmFri, Jun 5
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
Greenwich Mean TimeBST
Europe · UTC+1
5:36 amFri, Jun 5
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p

Offset

The time difference between Korea Standard Time and Greenwich Mean Time is 8 hours.

8 hours

Korea Standard Time (KST) is ahead of Greenwich Mean Time (BST).

KST: UTC+9

BST: UTC+1

Greenwich Mean Time is currently observing daylight saving time; Korea Standard Time is not.

When to schedule

Standard business hours (9 AM–5 PM, Mon–Fri) in Korea Standard Time and Greenwich Mean Time don't overlap on the same weekday. Greenwich Mean Time is 8 hours behind Korea Standard Time.

With some flexibility, there’s a workable window outside standard hours:

  • 3 PM–8 PM in Korea Standard Time (7 AM–12 PM in Greenwich Mean Time) — suggest 5:00 PM Korea Standard Time (9:00 AM Greenwich Mean Time).

This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.

This window may shift by an hour during daylight saving time.

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

United Kingdom

  • Good FridayFri, Apr 3
  • Early May Bank HolidayMon, May 4
  • Spring Bank HolidayMon, May 25
  • Christmas DayFri, Dec 25
  • St. Stephen's DayMon, Dec 28

About these zones

Korea Standard Time is also known as KST. To call South Korea, dial +82.

Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.

Greenwich Mean Time is approximately 5,500 miles northwest of Korea Standard Time.

Quick reference

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

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

Daylight saving time

Greenwich Mean Time observes daylight saving time; Korea Standard Time does not. The offset between the two zones changes when Greenwich Mean Time transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.

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

Daylight today

Korea Standard Time
Sunrise
5:12 AM
Sunset
7:51 PM
Day length
14h 38m
Greenwich Mean Time
Sunrise
4:47 AM
Sunset
9:13 PM
Day length
16h 25m

Daylight overlap: 7h 3m — 12:47 PM–7:51 PM in Korea Standard Time (4:47 AM–11:51 AM in Greenwich Mean Time). Both locations are in daylight during this window.

Cities in these zones

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Korea Standard Time

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

Airports in Greenwich Mean Time

  • LCY
  • LGW
  • LHR
  • LTN
  • STN
  • BHX
  • EMA
  • GLA
  • PIK
  • LBA

Related conversions

Common conversions

What is 9:00 am KST in GMT?
9:00 am KST is 1:00 am GMT.
What is 12:00 pm KST in GMT?
12:00 pm KST is 4:00 am GMT.
What is 12:30 pm KST in GMT?
12:30 pm KST is 4:30 am GMT.
What is 2:00 pm KST in GMT?
2:00 pm KST is 6:00 am GMT.
What is 5:00 pm KST in GMT?
5:00 pm KST is 9:00 am GMT.
What is 11:30 pm KST in GMT?
11:30 pm KST is 3:30 pm GMT.