Seoul to London
-8hSeoul
KSTSOURCELondon
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
KST and BST on the World Map
The map below highlights the KST (Korea Standard Time) and BST (Greenwich Mean Time) timezone regions across the globe.
KST – Korea Standard Time
UTC+09:00Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.
- •South Korea does not observe daylight saving time.
- •Seoul is home to Samsung, LG, and Hyundai headquarters.
- •KST is the same offset as JST (UTC+09:00).
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
About Seoul
WikipediaSeoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
Seoul has the fastest average internet speed in the world.
About London
WikipediaLondon, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
Big Ben is actually the name of the bell inside the Elizabeth Tower, not the tower itself.
Time Conversion Guide: Seoul to London
Seoul runs on Korean Standard Time (KST) at UTC+09:00. London runs on British Summer Time (BST) at UTC+01:00, also currently on daylight saving time. That puts Seoul 8 hours behind London — a difference of -8h at the current offsets.
In practice, when it is 9:00 AM in Seoul it is 1:00 AM in London. Midnight in Seoul is 4:00 PM in London.London observes daylight saving time while Seoul does not, so the gap narrows or widens by an hour part of the year.
Seoul to London time conversion table
| Seoul (KST) | London (BST) | Day |
|---|---|---|
| 12:00 AM | 4:00 PM | previous day |
| 6:00 AM | 10:00 PM | previous day |
| 7:00 AM | 11:00 PM | previous day |
| 8:00 AM | 12:00 AM | same day |
| 9:00 AM | 1:00 AM | same day |
| 12:00 PM | 4:00 AM | same day |
| 3:00 PM | 7:00 AM | same day |
| 5:00 PM | 9:00 AM | same day |
| 6:00 PM | 10:00 AM | same day |
| 9:00 PM | 1:00 PM | same day |
Why people convert Seoul to London time
- Scheduling a call from Seoul to London: a 10:00 AM start in Seoul lands at 2:00 AM in London, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -8h gap: Seoul and London have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in London is 1:00 AM in Seoul.
- Coordinating a Seoul-based team with London contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM KST" is unambiguous; "3 PM" across a -8h gap is not.
- With a -8h gap there is no shared 9-to-5 window, so alternate the early start: one week Seoul takes the early slot, the next week London does.
- London: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.
About KST (Korea Standard Time)
Korea Standard Time (KST) is the time zone used in South Korea. It shares the same UTC offset as Japan Standard Time but is a distinct time zone. South Korea does not observe daylight saving time. Seoul, the capital, is a major global tech and business hub.
About GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
Best time to call between Seoul and London
With a -8h offset there is no overlap inside a normal 9 AM – 5 PM day. London opens at 9:00 AM BST, which is 1:00 AM in Seoul, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Seoul and London have no shared working hours because of the -8h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Seoul is 8 hours behind London (KST UTC+09:00 → BST UTC+01:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Seoul
Does not observe DST
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Seoul and London?
Seoul (KST, UTC+09:00) is 8 hours behind London (BST, UTC+01:00). The gap is currently -8h.
How do I convert Seoul time to London time?
Add -8h to Seoul local time. For example, 9:00 AM in Seoul is 1:00 AM in London.
What time is it in London right now?
London uses BST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -8h offset from Seoul.
What is the best time to call London from Seoul?
There is no shared working-hours window because of the -8h gap. The closest option is 1:00 PM in Seoul, which is 5:00 AM in London.
Which is behind, Seoul or London?
Seoul is 8 hours behind London. When it is 12:00 PM in Seoul it is 4:00 AM in London.
Do Seoul and London use different time zones?
Seoul (South Korea) uses KST at UTC+09:00, while London (UK) uses BST at UTC+01:00. The IANA identifiers are Asia/Seoul and Europe/London.
Does daylight saving time affect the Seoul–London difference?
Yes at the moment: London is on daylight saving time and Seoul is not, so the -8h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Seoul's time zone?
KST also covers Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
Which countries use KST, Seoul's zone?
KST is used in South Korea, North Korea.
Is there a day difference between Seoul and London?
Not normally. The -8h gap only pushes the date over the previous day.
What is the time difference between Seoul and London?
London is -8h from Seoul.
What timezone is Seoul in?
Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
What timezone is London in?
London, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
What are the business hours in Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
What is the best time to schedule a call between Seoul and London?
The best overlap for a call is when both cities are in business hours. Seoul works 9:00 AM - 6:00 PM KST and London works 9:00 AM - 5:00 PM GMT (-8h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Seoul and London?
Seoul uses KRW (₩) while London uses GBP (£). Check current exchange rates when planning travel or business between these cities.
How do Seoul and London compare in size?
Seoul has a population of approximately 9.7 million (metro: 25.5 million), while London has approximately 8.8 million (metro: 14.8 million).
What are the major landmarks in Seoul and London?
Seoul is known for Gyeongbokgung Palace, N Seoul Tower, Bukchon Hanok Village. London is famous for Big Ben, Tower Bridge, Buckingham Palace.
Do Seoul and London have stock exchanges?
Yes. Seoul has the KRX (Korea Exchange) and London has the LSE (London Stock Exchange). The -8h time difference affects trading hour overlaps between these exchanges.
Which countries use KST (Korea Standard Time)?
KST is used in South Korea, North Korea.
Does KST observe daylight saving time?
No, KST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about KST?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
Which cities are in the GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
When is it midnight in Seoul, what time is it in London?
When it is 12:00 AM (midnight) in Seoul (KST), it is -8h later in London (GMT).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More Seoul time conversions
- seoul to kst
- seoul to south korea
- seoul to dubai
- seoul to mumbai
- seoul to delhi
- seoul to bangalore
- seoul to kathmandu
- seoul to bangkok
- seoul to singapore
- seoul to hong kong
- seoul to shanghai
- seoul to beijing
- seoul to tokyo
- seoul to osaka
- seoul to new york
- seoul to sydney
- seoul to los angeles
- seoul to paris
- seoul to berlin
- seoul to toronto
- new york to seoul
- london to seoul
- dubai to seoul
- tokyo to seoul
- singapore to seoul
- sydney to seoul
- los angeles to seoul
- paris to seoul
- delhi to seoul
- mumbai to seoul
- berlin to seoul
- hong kong to seoul
- toronto to seoul
- kathmandu to seoul
See every conversion from Seoul →·See every conversion from London →