What is the time difference between London and Seoul?

Seoul (KST, UTC+9) is 9 hours ahead of London in winter (GMT, UTC+0) and 8 hours ahead in summer (BST, UTC+1). South Korea does not observe Daylight Saving Time, so the offset changes only when the UK shifts its clocks in spring and autumn.

Does Seoul observe Daylight Saving Time?

No. South Korea abolished DST in 1988 and has not used it since. Seoul stays on KST (UTC+9) all year. Only London shifts its clocks, which is why the London-Seoul gap alternates between 9 and 8 hours.

When does the offset change from 9 to 8 hours?

The UK moves clocks forward on the last Sunday in March at 01:00 GMT, entering BST (UTC+1). At that point Seoul goes from 9 hours ahead to 8 hours ahead. The gap returns to 9 hours on the last Sunday in October at 02:00 BST when the UK reverts to GMT.

What are the best meeting times for London and Seoul?

The overlap between standard business hours (09:00–18:00) is narrow. When London is at 09:00 GMT it is 18:00 in Seoul — the very end of the Seoul workday. A 08:00–09:00 London call is the most realistic option, catching Seoul at 17:00–18:00 KST.

Is this tool accurate for scheduling?

Yes. It uses the IANA timezone database embedded in your browser — the same source used by operating systems and calendar apps worldwide. Accuracy depends on your device clock being synchronized via NTP, which most devices do automatically.

KST stands for Korea Standard Time. It is UTC+9, used across South Korea year-round. There is no Korea Daylight Saving Time because South Korea does not observe DST.

Time Difference: London to Seoul

See the current time in London and Seoul side by side, with the live UTC offset (KST is UTC+9, so Seoul is 9h ahead of GMT or 8h ahead of BST), updated every second.

London, United Kingdom

--:--:--

GMT UTC+0

Seoul, South Korea

--:--:--

KST UTC+9

Current Offset

+9 hours

Seoul is 9 hours ahead of London

Meeting Overlap Finder

Business hours (09:00–18:00) highlighted — best overlap shaded

London	Seoul	Status

Convert London Time to Seoul Time

Based on the current offset — updates automatically

London	Seoul

Summary

This tool displays the live current time in both London (Europe/London — GMT in winter, BST in summer) and Seoul (Asia/Seoul — KST, UTC+9 year-round, no DST) side by side. Seoul does not observe Daylight Saving Time, so the offset between the two cities shifts twice a year: 9 hours ahead of London in winter (GMT) and 8 hours ahead in summer (BST). Use this tool to schedule calls with South Korea, coordinate remote teams, or check whether Seoul colleagues are still at work.

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Europe/London time using the IANA timezone database built into modern browsers.
The same moment is converted to Asia/Seoul time (KST, UTC+9).
The UTC offsets of both cities are compared to calculate the exact hour difference.
All three values — London time, Seoul time, and the offset — refresh every second.
When London switches between GMT and BST, the displayed offset adjusts automatically from +9 to +8 hours.

Use cases

Scheduling video calls between London and Seoul offices.
Checking if a colleague in Seoul is still at their desk.
Planning UK-South Korea travel and arrival time comparisons.
Remote teams coordinating daily standups across the UK and South Korea.
Finding overlapping business hours for London-Seoul meetings.
Verifying whether London is currently on GMT or BST.
Journalists checking broadcast times for live South Korea events.
Students and teachers arranging online lessons between the UK and South Korea.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu