GMT to KST Converter & Meeting Planner
Quick answer: 9:00 AM GMT = 6:00 PM KST (fixed +00:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Greenwich Mean Time (GMT) and Korea Standard Time (KST)? You need to account for the standard time difference. Korea Standard Time is normally 9 hours ahead of Greenwich Mean Time. Whether you are coordinating between teams in London and Dublin and Seoul and Busan, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM GMT = 9:00 AM KST. The full 24-hour GMT to KST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM GMT = 12:00 AM KST (+1 day).
| GMT Time | KST Time |
|---|---|
| 12:00 AM (00:00) | 9:00 AM (09:00) |
| 1:00 AM (01:00) | 10:00 AM (10:00) |
| 2:00 AM (02:00) | 11:00 AM (11:00) |
| 3:00 AM (03:00) | 12:00 PM (12:00) |
| 4:00 AM (04:00) | 1:00 PM (13:00) |
| 5:00 AM (05:00) | 2:00 PM (14:00) |
| 6:00 AM (06:00) | 3:00 PM (15:00) |
| 7:00 AM (07:00) | 4:00 PM (16:00) |
| 8:00 AM (08:00) | 5:00 PM (17:00) |
| 9:00 AM (09:00) | 6:00 PM (18:00) |
| 10:00 AM (10:00) | 7:00 PM (19:00) |
| 11:00 AM (11:00) | 8:00 PM (20:00) |
| 12:00 PM (12:00) | 9:00 PM (21:00) |
| 1:00 PM (13:00) | 10:00 PM (22:00) |
| 2:00 PM (14:00) | 11:00 PM (23:00) |
| 3:00 PM (15:00) | 12:00 AM (00:00)+1 day |
| 4:00 PM (16:00) | 1:00 AM (01:00)+1 day |
| 5:00 PM (17:00) | 2:00 AM (02:00)+1 day |
| 6:00 PM (18:00) | 3:00 AM (03:00)+1 day |
| 7:00 PM (19:00) | 4:00 AM (04:00)+1 day |
| 8:00 PM (20:00) | 5:00 AM (05:00)+1 day |
| 9:00 PM (21:00) | 6:00 AM (06:00)+1 day |
| 10:00 PM (22:00) | 7:00 AM (07:00)+1 day |
| 11:00 PM (23:00) | 8:00 AM (08:00)+1 day |
Best time to call Seoul from London
For most work calls, compare the normal business day in London (GMT) with the business day in Seoul (KST). GMT commonly covers Europe, Africa, while KST is mainly associated with East Asia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 9:00 AM - 10:00 AM GMT, which corresponds to 5:00 PM - 6:00 PM KST. This window sits inside the typical GMT workday (9:00 AM - 5:00 PM) and the KST workday (9:00 AM - 6:00 PM).
- DST Safety: GMT or KST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- London Stock Exchange: 08:00-16:30 local time in London.
- Korea Exchange (KRX): 09:00-15:30 local time in Seoul.
🔥 Popular GMT & KST Converters
Frequently searched time zone conversions related to your search.
Related Time Converters
Explore nearby time zone offsets and reverse conversions related to GMT and KST.
Frequently Asked Questions
What is the time difference between GMT and KST?
During standard time, Korea Standard Time is 9 hours ahead of Greenwich Mean Time.
What is the difference between GMT and BST?
GMT (Greenwich Mean Time) is the UK's standard winter offset at UTC+0, observed from the last Sunday in October through the last Sunday in March. BST (British Summer Time) is the daylight saving offset at UTC+1, applied each summer when clocks advance one hour.
Is GMT the same as UTC?
GMT and UTC share exactly the same numerical offset — both represent UTC+00:00 — but they are fundamentally different in nature. UTC is an atomic-clock-based international time standard used as the global reference, while GMT is a geographic time zone legally observed by specific countries including the United Kingdom and Ireland during winter months.
Does South Korea observe Daylight Saving Time?
South Korea does not observe Daylight Saving Time and has not done so since 1988, when DST was discontinued following the Seoul Summer Olympics. KST remains fixed at UTC+9:00 every day of the year, meaning the offset between Seoul and any DST-observing country shifts by one hour twice annually when those countries change their clocks.
Are KST and JST the same?
Yes, Korea Standard Time (KST) and Japan Standard Time (JST) share the identical UTC+9:00 offset, and neither country observes Daylight Saving Time. Seoul and Tokyo run on exactly the same clock year-round, which directly supports the deep semiconductor, automotive, and consumer electronics supply chain integration between the two economies.