BST to KST
+8hBST
BSTSOURCEKST
KSTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and KST on the World Map
The map below highlights the BST (British Summer Time) and KST (Korea Standard Time) timezone regions across the globe.
BST – British Summer Time
UTC+01:00British Summer Time (BST, UTC+01:00) is the daylight saving period in the United Kingdom, running from late March to late October.
- •BST runs from the last Sunday in March to the last Sunday in October.
- •BST is exactly one hour ahead of GMT, the UK's standard time.
- •During BST, London is 4 hours ahead of New York while the US is on Eastern Daylight Time.
- •The Isle of Man and the Channel Islands also observe BST.
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).
Comparing Time Zones: BST and KST
BST runs on British Summer Time (BST) at UTC+01:00. KST runs on Korea Standard Time (KST) at UTC+09:00. That puts BST 8 hours ahead of KST — a difference of +8h at the current offsets.
In practice, when it is 9:00 AM in BST it is 5:00 PM in KST. Midnight in BST is 8:00 AM in KST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
BST to KST time conversion table
| BST (BST) | KST (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 BST to KST time
- Scheduling a call from BST to KST: a 10:00 AM start in BST lands at 6:00 PM in KST, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +8h gap: BST and KST 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 KST is 5:00 PM in BST.
- Coordinating a BST-based team with KST 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 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 BST takes the early slot, the next week KST does.
About BST (British Summer Time)
British Summer Time (BST) is the daylight saving period in the United Kingdom, when clocks move one hour forward from Greenwich Mean Time (GMT, UTC+00:00) to UTC+01:00. It runs from the last Sunday in March to the last Sunday in October. England, Scotland, Wales and Northern Ireland all follow it, along with the Isle of Man and the Channel Islands of Jersey and Guernsey. During BST, London is one hour ahead of UTC, four hours ahead of New York on Eastern Daylight Time, and five hours ahead of New York once the United States returns to Eastern Standard Time in November. BST is also used to abbreviate Bangladesh Standard Time (UTC+06:00), which is listed separately on this site.
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 BST and KST
With a +8h offset there is no overlap inside a normal 9 AM – 5 PM day. KST opens at 9:00 AM KST, which is 5:00 PM in BST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
BST and KST have no shared working hours because of the +8h gap. Teams need to alternate early starts or rely on asynchronous handovers.
BST is 8 hours ahead of KST (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
BST
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
KST
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 BST and KST?
BST (BST, UTC+01:00) is 8 hours ahead of KST (KST, UTC+09:00). The gap is currently +8h.
How do I convert BST time to KST time?
Add +8h to BST local time. For example, 9:00 AM in BST is 5:00 PM in KST.
What time is it in KST right now?
KST 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 BST.
What is the best time to call KST from BST?
There is no shared working-hours window because of the +8h gap. The closest option is 1:00 PM in BST, which is 9:00 PM in KST.
Which is ahead, BST or KST?
BST is 8 hours ahead of KST. When it is 12:00 PM in BST it is 8:00 PM in KST.
Does daylight saving time affect the BST–KST difference?
Neither zone observes daylight saving time, so the +8h offset between BST and KST is fixed all year.
Which other cities share BST's time zone?
BST also covers London, Birmingham, Manchester, Glasgow, Edinburgh, Cardiff, Belfast, Liverpool and 2 more.
Which countries use BST, BST's zone?
BST is used in United Kingdom.
Is there a day difference between BST and KST?
Not normally. The +8h gap only pushes the date over for late-evening times.
What is the time difference between BST and KST?
KST is +8h from BST.
What timezone is BST in?
BST operates on its local timezone.
What timezone is KST in?
KST operates on its local timezone.
Which countries use BST (British Summer Time)?
BST is used in United Kingdom.
Does BST observe daylight saving time?
Yes, BST switches to BST during summer months.
What are some interesting facts about BST?
BST runs from the last Sunday in March to the last Sunday in October. BST is exactly one hour ahead of GMT, the UK's standard time.
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 BST, what time is it in KST?
When it is 12:00 AM (midnight) in BST (BST), it is +8h later in KST (KST).
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