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JST to BST Time Converter

Use this JST to BST time converter to compare Japan and United Kingdom time instantly. BST is 8 hours behind JST, so 9:00 AM JST becomes 1:00 AM BST and 5:00 PM JST becomes 9:00 AM BST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.

JST Japan Standard Time
...
BST British Summer Time
...
Select a time to convert

JST to BST Quick Facts

Use this JST to BST converter to compare Japan and United Kingdom time, check the 8 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 5:00 PM JST / 9:00 AM BST.

Time Difference
British Summer Time is 8 hours behind Japan Standard Time
Useful when deadlines, handoffs, or calls cross workday boundaries.
Best Call Window
Best overlap starts around 5:00 PM JST and 9:00 AM BST.
Common Use Cases
Useful for remote teams, customer support windows, travel planning, webinars, and same-day deadline handoffs.

How to Convert JST to BST

Converting between Japan Standard Time and British Summer Time means accounting for a 8 hours gap — here's how to do it in under 10 seconds with no sign-up.

Enter Your JST Time

Pick the date and time in Japan Standard Time (UTC +9) that you want to convert. Hit "Now" to load the current JST time instantly, or use "+1h" to step forward and compare.

Read the BST Result

The equivalent British Summer Time (UTC +1) time appears immediately. Since BST is 8 hours behind of JST, most daytime conversions stay on the same calendar day.

Copy or Fine-Tune

Click "Copy Time" to grab the BST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — helpful for scheduling recurring Japan–United Kingdom calls.

Why Choose Our JST to BST Converter

Align JST–BST Meetings Instantly

When someone in Japan suggests 5:00 PM JST, that's 9:00 AM BST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.

Spot Date-Line Shifts at a Glance

Late-night JST times can land on a different date in BST because of the 8 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.

Handles DST Transitions Automatically

Daylight Saving adjustments can widen or narrow the JST–BST gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.

Never Miss a JST-Timed Event

Product launches, sports matches, and webinars are often announced in JST. Convert the event time to BST so you know exactly when to tune in — with a 8 hours difference, a morning event in Japan hits the evening in United Kingdom.

JST to BST Time Conversion Chart

Quick-reference conversion table covering every hour of the day at a glance.

Complete 24-Hour Conversion

Japan Standard Time to British Summer Time full day schedule

12:00 AM
JST
→
4:00 PM
BST
(previous day)
1:00 AM
JST
→
5:00 PM
BST
(previous day)
2:00 AM
JST
→
6:00 PM
BST
(previous day)
3:00 AM
JST
→
7:00 PM
BST
(previous day)
4:00 AM
JST
→
8:00 PM
BST
(previous day)
5:00 AM
JST
→
9:00 PM
BST
(previous day)
6:00 AM
JST
→
10:00 PM
BST
(previous day)
7:00 AM
JST
→
11:00 PM
BST
(previous day)
8:00 AM
JST
→
12:00 AM
BST
9:00 AM
JST
→
1:00 AM
BST
10:00 AM
JST
→
2:00 AM
BST
11:00 AM
JST
→
3:00 AM
BST
12:00 PM
JST
→
4:00 AM
BST
1:00 PM
JST
→
5:00 AM
BST
2:00 PM
JST
→
6:00 AM
BST
3:00 PM
JST
→
7:00 AM
BST
4:00 PM
JST
→
8:00 AM
BST
5:00 PM
JST
→
9:00 AM
BST
6:00 PM
JST
→
10:00 AM
BST
7:00 PM
JST
→
11:00 AM
BST
8:00 PM
JST
→
12:00 PM
BST
9:00 PM
JST
→
1:00 PM
BST
10:00 PM
JST
→
2:00 PM
BST
11:00 PM
JST
→
3:00 PM
BST
The two zones in context

JST vs BST — cities and working rhythm

JST — Japan Standard Time
Primary cities: Tokyo, Osaka, Sapporo, Nagoya, Fukuoka

Japan — one of the few large economies that has no DST, so JST is JST year-round (UTC+9). Business hours 9 AM – 6 PM JST with strong presence-based culture (staying past 7 PM is common). Same offset as Korean Standard Time (KST).

BST — British Summer Time
Primary cities: London, Dublin, Edinburgh (summer only)

UK / Ireland summer offset (last Sunday of March to last Sunday of October) — UTC+1, same as CET. During BST, London aligns with continental European working hours rather than the standard 1-hour gap. Winter reverts to GMT (UTC+0).

Time gap: BST is 8.0 hours behind JST (standard-time offsets — daylight-saving flips shift this by an hour twice a year in most northern-hemisphere zones).

JST to BST FAQ

Quick answers about daylight saving time, date changes, business-hour overlap, and the most common scheduling questions between Japan Standard Time and British Summer Time.

What is the time difference between JST and BST?

BST is 8 hours behind JST. JST is UTC +9:00 and BST is UTC +1:00 relative to UTC. BST observes daylight saving but JST does not, so the gap shifts by an hour twice a year. In BST winter the difference is 8 hours; in summer it changes by one hour.

When can JST and BST have business-hour overlap?

Aim for 17:00–17:00 JST, which is 09:00–09:00 BST. Both sides stay inside standard business hours.

Does JST or BST observe daylight saving time?

BST observes daylight saving but JST does not, so the gap shifts by an hour twice a year. In BST winter the difference is 8 hours; in summer it changes by one hour.

How do I quickly convert JST to BST?

To convert JST to BST, add 8 hours subtract from the JST time. Example: if it's 10:00 AM JST, it's 02:00 BST that day. The live converter at the top of this page handles DST automatically.

Popular JST Time Converters

Explore more JST conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.

Convert Other Time Zones to BST

Find the time difference from any major zone into British Summer Time. Use these pages when scheduling with United Kingdom from a different region.

🇬🇧 Swap direction — BST to JST Converter