KST to United Kingdom
-8hKST
KSTSOURCEUnited Kingdom
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.
Time Conversion Guide: KST to United Kingdom
KST runs on Korea Standard Time (KST) at UTC+09:00. United Kingdom runs on British Summer Time (BST) at UTC+01:00, also currently on daylight saving time. That puts KST 8 hours behind United Kingdom — a difference of -8h at the current offsets.
In practice, when it is 9:00 AM in KST it is 1:00 AM in United Kingdom. Midnight in KST is 4:00 PM in United Kingdom.United Kingdom observes daylight saving time while KST does not, so the gap narrows or widens by an hour part of the year.
KST to United Kingdom time conversion table
| KST (KST) | United Kingdom (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 KST to United Kingdom time
- Scheduling a call from KST to United Kingdom: a 10:00 AM start in KST lands at 2:00 AM in United Kingdom, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -8h gap: KST and United Kingdom 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 United Kingdom is 1:00 AM in KST.
- Coordinating a KST-based team with United Kingdom 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 KST takes the early slot, the next week United Kingdom does.
- United Kingdom: 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 KST and United Kingdom
With a -8h offset there is no overlap inside a normal 9 AM – 5 PM day. United Kingdom opens at 9:00 AM BST, which is 1:00 AM in KST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
KST and United Kingdom have no shared working hours because of the -8h gap. Teams need to alternate early starts or rely on asynchronous handovers.
KST is 8 hours behind United Kingdom (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
KST
Does not observe DST
United Kingdom
☀ 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 KST and United Kingdom?
KST (KST, UTC+09:00) is 8 hours behind United Kingdom (BST, UTC+01:00). The gap is currently -8h.
How do I convert KST time to United Kingdom time?
Add -8h to KST local time. For example, 9:00 AM in KST is 1:00 AM in United Kingdom.
What time is it in United Kingdom right now?
United Kingdom 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 KST.
What is the best time to call United Kingdom from KST?
There is no shared working-hours window because of the -8h gap. The closest option is 1:00 PM in KST, which is 5:00 AM in United Kingdom.
Which is behind, KST or United Kingdom?
KST is 8 hours behind United Kingdom. When it is 12:00 PM in KST it is 4:00 AM in United Kingdom.
Do KST and United Kingdom use different time zones?
KST uses KST at UTC+09:00, while United Kingdom (United Kingdom) uses BST at UTC+01:00. The IANA identifiers are Asia/Seoul and Europe/London.
Does daylight saving time affect the KST–United Kingdom difference?
Yes at the moment: United Kingdom is on daylight saving time and KST is not, so the -8h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share KST's time zone?
KST also covers Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
Which countries use KST, KST's zone?
KST is used in South Korea, North Korea.
Is there a day difference between KST and United Kingdom?
Not normally. The -8h gap only pushes the date over the previous day.
What is the time difference between KST and United Kingdom?
United Kingdom is -8h from KST.
What timezone is KST in?
KST operates on its local timezone.
What timezone is United Kingdom in?
United Kingdom operates on its local timezone.
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 KST, what time is it in United Kingdom?
When it is 12:00 AM (midnight) in KST (KST), it is -8h later in United Kingdom (GMT).
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