Korea Standard Time (kst) is used in South Korea. The IANA timezone identifier is Asia/Seoul.

Coordinated Universal Time (utc) is used in United Kingdom. The IANA timezone identifier is UTC.

KST to UTC Time Converter

Korea Standard Time → Coordinated Universal Time

KST = UTC+9UTC = UTC+0

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

UTC (London)

United Kingdom · -8h

01:00

New York

USA · -13h

20:00-1 day

Tokyo

Japan · UTC±0

09:00

Dubai

United Arab Emirates · -5h

04:00

Sydney

Australia · +1h

10:00

KST (Seoul) ↔ UTC (London) — time offset

KST (Seoul) is 9 hours ahead of UTC (London). When KST (Seoul) clocks hit noon, UTC (London) reads 03:00.

KST (Seoul) is in the Asia/Seoul timezone. UTC (London) is in Europe/London. The difference is 9 hours.

Mutual working hours

KST (Seoul) and UTC (London) have no shared working hours under a standard 9:00–17:00 schedule. One side will always need to join at an off-hour.

When to schedule across time zones

Since KST (Seoul) and UTC (London) don't share working hours, these are the most practical options available.

16:00 Seoul / 07:00 London⚡ One side off-hours

⚠️ 2h before working hours in London

18:00 Seoul / 09:00 London⚡ One side off-hours

⚠️ 2h after working hours in Seoul

15:00 Seoul / 06:00 London⚡ One side off-hours

⚠️ 3h before working hours in London

Based on standard 09:00–17:00 working hours in each location's local time.

Holiday calendar for both locations

KST (Seoul)7 holidays

Aug 15Liberation Day

Sep 24Chuseok

Sep 25Chuseok

Sep 26Chuseok

Oct 3National Foundation Day

UTC (London)

No upcoming public holidays this year.

Working across KST (Seoul) and UTC (London)

KST (Seoul) (South Korea) and UTC (London) (United Kingdom) are 9 hours apart — far enough that standard 9–5 schedules do not overlap. Any real-time meeting means someone is joining outside their normal hours.

💡 Best practice for cross-timezone meetings

⚡

When KST (Seoul) is at 16:00, UTC (London) reads 07:00 — 2h before working hours in London.

⚡

When KST (Seoul) is at 18:00, UTC (London) reads 09:00 — 2h after working hours in Seoul.

⚡

When KST (Seoul) is at 15:00, UTC (London) reads 06:00 — 3h before working hours in London.

Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.

DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.

Get the Extension — Free →

Use the time slider above to find the exact equivalent time for any moment in KST (Seoul). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

KST (Seoul) ↔ UTC (London)

No overlap — one side will join outside working hours

KST (Seoul)

UTC (London)