Offset
The time difference between Busan and Greenwich Mean Time is 8 hours.
Busan (KST) is ahead of Greenwich Mean Time (BST).
KST: UTC+9
BST: UTC+1
Greenwich Mean Time is currently observing daylight saving time; Busan is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Busan and Greenwich Mean Time don't overlap on the same weekday. Greenwich Mean Time is 8 hours behind Busan.
With some flexibility, there’s a workable window outside standard hours:
- 3 PM–8 PM in Busan (7 AM–12 PM in Greenwich Mean Time) — suggest 5:00 PM Busan (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
Busan uses Korea Standard Time (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 5,700 miles northwest of Busan.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Busan | GMT | Day |
|---|---|---|
| 12:00 am | 4:00 pm | -1 day |
| 1:00 am | 5:00 pm | -1 day |
| 2:00 am | 6:00 pm | -1 day |
| 3:00 am | 7:00 pm | -1 day |
| 4:00 am | 8:00 pm | -1 day |
| 5:00 am | 9:00 pm | -1 day |
| 6:00 am | 10:00 pm | -1 day |
| 7:00 am | 11:00 pm | -1 day |
| 8:00 am | 12:00 am | Same day |
| 9:00 am | 1:00 am | Same day |
| 10:00 am | 2:00 am | Same day |
| 11:00 am | 3:00 am | Same day |
| 12:00 pm | 4:00 am | Same day |
| 1:00 pm | 5:00 am | Same day |
| 2:00 pm | 6:00 am | Same day |
| 3:00 pm | 7:00 am | Same day |
| 4:00 pm | 8:00 am | Same day |
| 5:00 pm | 9:00 am | Same day |
| 6:00 pm | 10:00 am | Same day |
| 7:00 pm | 11:00 am | Same day |
| 8:00 pm | 12:00 pm | Same day |
| 9:00 pm | 1:00 pm | Same day |
| 10:00 pm | 2:00 pm | Same day |
| 11:00 pm | 3:00 pm | Same day |
Daylight saving time
Greenwich Mean Time observes daylight saving time; Busan 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
- Sunrise
- 5:58 AM
- Sunset
- 6:51 PM
- Day length
- 12h 52m
- Sunrise
- 6:15 AM
- Sunset
- 7:47 PM
- Day length
- 13h 32m
Cities in these zones
Cities in Greenwich Mean Time
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 Busan in GMT?
- 9:00 am Busan is 1:00 am GMT.
- What is 12:00 pm Busan in GMT?
- 12:00 pm Busan is 4:00 am GMT.
- What is 12:30 pm Busan in GMT?
- 12:30 pm Busan is 4:30 am GMT.
- What is 2:00 pm Busan in GMT?
- 2:00 pm Busan is 6:00 am GMT.
- What is 5:00 pm Busan in GMT?
- 5:00 pm Busan is 9:00 am GMT.
- What is 11:30 pm Busan in GMT?
- 11:30 pm Busan is 3:30 pm GMT.