London to South Korea
+8hLondon
BSTSOURCESouth Korea
KSTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and KST on the World Map
The map below highlights the BST (Greenwich Mean Time) and KST (Korea Standard Time) timezone regions across the globe.
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.
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).
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.
Understanding the +8h Gap: London vs South Korea
London runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. South Korea runs on Korean Standard Time (KST) at UTC+09:00. That puts London 8 hours ahead of South Korea — a difference of +8h at the current offsets.
In practice, when it is 9:00 AM in London it is 5:00 PM in South Korea. Midnight in London is 8:00 AM in South Korea.London observes daylight saving time while South Korea does not, so the gap narrows or widens by an hour part of the year.
London to South Korea time conversion table
| London (BST) | South Korea (KST) | Day |
|---|---|---|
| 12:00 AM | 8:00 AM | same day |
| 6:00 AM | 2:00 PM | same day |
| 7:00 AM | 3:00 PM | same day |
| 8:00 AM | 4:00 PM | same day |
| 9:00 AM | 5:00 PM | same day |
| 12:00 PM | 8:00 PM | same day |
| 3:00 PM | 11:00 PM | same day |
| 5:00 PM | 1:00 AM | next day |
| 6:00 PM | 2:00 AM | next day |
| 9:00 PM | 5:00 AM | next day |
Why people convert London to South Korea time
- Scheduling a call from London to South Korea: a 10:00 AM start in London lands at 6:00 PM in South Korea, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +8h gap: London and South Korea 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 South Korea is 5:00 PM in London.
- Booking travel or deliveries: tracking South Korea local time against London keeps pickup windows and arrival estimates honest across the +8h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM BST" 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 London takes the early slot, the next week South Korea does.
- London: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +8h gap.
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.
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.
Best time to call between London and South Korea
With a +8h offset there is no overlap inside a normal 9 AM – 5 PM day. South Korea opens at 9:00 AM KST, which is 5:00 PM in London, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
London and South Korea have no shared working hours because of the +8h gap. Teams need to alternate early starts or rely on asynchronous handovers.
London is 8 hours ahead of South Korea (BST UTC+01:00 → KST UTC+09:00). 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
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
South Korea
Does not observe DST
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 London and South Korea?
London (BST, UTC+01:00) is 8 hours ahead of South Korea (KST, UTC+09:00). The gap is currently +8h.
How do I convert London time to South Korea time?
Add +8h to London local time. For example, 9:00 AM in London is 5:00 PM in South Korea.
What time is it in South Korea right now?
South Korea uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +8h offset from London.
What is the best time to call South Korea from London?
There is no shared working-hours window because of the +8h gap. The closest option is 1:00 PM in London, which is 9:00 PM in South Korea.
Which is ahead, London or South Korea?
London is 8 hours ahead of South Korea. When it is 12:00 PM in London it is 8:00 PM in South Korea.
Do London and South Korea use different time zones?
London (UK) uses BST at UTC+01:00, while South Korea (South Korea) uses KST at UTC+09:00. The IANA identifiers are Europe/London and Asia/Seoul.
Does daylight saving time affect the London–South Korea difference?
Yes at the moment: London is on daylight saving time and South Korea is not, so the +8h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share London's time zone?
BST also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.
Which countries use BST, London's zone?
BST is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.
Is there a day difference between London and South Korea?
Not normally. The +8h gap only pushes the date over for late-evening times.
What is the time difference between London and South Korea?
South Korea is +8h from London.
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 timezone is South Korea in?
South Korea operates on its local timezone.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
Which countries use GMT (Greenwich Mean Time)?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.
Does GMT observe daylight saving time?
Yes, GMT switches to BST during summer months.
What are some interesting facts about GMT?
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.
Which cities are in the KST timezone?
Major cities in the KST timezone include Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
What is the UTC offset for KST?
Korea Standard Time (KST) is at UTC+09:00.
What should I know about the KST timezone?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
When is it midnight in London, what time is it in South Korea?
When it is 12:00 AM (midnight) in London (GMT), it is +8h later in South Korea (KST).
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