London to KST
Korea Standard Time is 8 hours ahead of United Kingdom Time for 210 days of the year, and takes 2 different values across the year.
London to KST conversion table
Every hour of the day at the difference that holds for 210 days of 2026 — 8 hours. See “When the difference changes” below for the rest.
| London | KST |
|---|---|
| 12:00 AM | 8:00 AM |
| 1:00 AM | 9:00 AM |
| 2:00 AM | 10:00 AM |
| 3:00 AM | 11:00 AM |
| 4:00 AM | 12:00 PM |
| 5:00 AM | 1:00 PM |
| 6:00 AM | 2:00 PM |
| 7:00 AM | 3:00 PM |
| 8:00 AM | 4:00 PM |
| 9:00 AM | 5:00 PM |
| 10:00 AM | 6:00 PM |
| 11:00 AM | 7:00 PM |
| London | KST |
|---|---|
| 12:00 PM | 8:00 PM |
| 1:00 PM | 9:00 PM |
| 2:00 PM | 10:00 PM |
| 3:00 PM | 11:00 PM |
| 4:00 PM | 12:00 AM +1 day |
| 5:00 PM | 1:00 AM +1 day |
| 6:00 PM | 2:00 AM +1 day |
| 7:00 PM | 3:00 AM +1 day |
| 8:00 PM | 4:00 AM +1 day |
| 9:00 PM | 5:00 AM +1 day |
| 10:00 PM | 6:00 AM +1 day |
| 11:00 PM | 7:00 AM +1 day |
Shared working hours
They do not overlap at all. A 09:00–17:00 working day in United Kingdom Time ends no time at all before the Korea Standard Time one begins, so any live call sits outside somebody's working hours.
The shortest reach is the edges: early morning in London against late evening in KST, or the other way round.
When the difference changes
The two zones move their clocks on different dates, so the gap takes more than one value. These are the stretches of 2026:
| Dates | KST is | Why |
|---|---|---|
| 1 January – 29 March | 9 hours ahead of | — |
| 29 March – 25 October | 8 hours ahead of | United Kingdom Time clocks go forward one hour |
| 25 October – 31 December | 9 hours ahead of | United Kingdom Time clocks go back one hour |
Dates are United Kingdom Time local dates for 2026. Transition dates move by a few days from year to year; the rule each country follows does not.
About United Kingdom Time
The United Kingdom is on GMT (UTC+0) for about five months and BST (UTC+1) for the rest, changing on the last Sunday in March and the last Sunday in October. Ireland keeps exactly the same clock, so every figure here applies to Dublin as well as London.
Cities on this clock: London, Lisbon, Dublin, Edinburgh, Manchester.
About Korea Standard Time
Korea is a fixed UTC+9, the same clock as Japan. Daylight saving was last used for the 1988 Olympics and has not returned.
Cities on this clock: Tokyo, Osaka, Seoul.
How the difference is worked out
The gap between United Kingdom Time and Korea Standard Time is not one number. The two zones change their clocks on different dates, so for part of the year the difference is 8 hours and for the rest it is something else — the table above lists each stretch of 2026 with the date it starts and which country's clocks moved.
With both zones on their own standard time — daylight saving not in force anywhere — Korea Standard Time is 9 hours ahead of United Kingdom Time. That figure never changes; everything else on this page follows from it plus whichever clocks have moved.
Every figure here comes from the IANA time zone database via your browser's own Intl engine, using the zone ids Europe/London and Asia/Seoul. Nothing is looked up on a server and nothing about your visit is recorded.
Is KST ahead of or behind London?
Korea Standard Time is 8 hours ahead of United Kingdom Time for 210 days of the year, and takes 2 different values across the year. The gap moves because the two zones change their clocks on different dates — on 29 March, United Kingdom Time clocks go forward one hour; on 25 October, United Kingdom Time clocks go back one hour (dates for 2026).
What time is 9 AM London in KST?
9:00 AM London is 5:00 PM KST for most of the year — see the table above for the 3 stretches of 2026 the gap holds different values.
When can United Kingdom Time and Korea Standard Time meet?
They do not overlap. A 09:00–17:00 working day in United Kingdom Time ends no time at all before the Korea Standard Time one begins, so a call has to sit outside someone's working hours — early morning in United Kingdom Time or late evening in Korea Standard Time is usually the shortest reach.
What does London stand for?
London is United Kingdom Time, also written GMT, BST, British Summer Time. The United Kingdom is on GMT (UTC+0) for about five months and BST (UTC+1) for the rest, changing on the last Sunday in March and the last Sunday in October. Ireland keeps exactly the same clock, so every figure here applies to Dublin as well as London.