JST to BST Time Converter

Convert Japan Standard Time (JST) to British Summer Time (BST). Both time zones are shown live below; current offset between them is 8 hours behind.

Tokyo · Japan Standard Time
05:55:28
Monday, May 11, 2026
GMT+9 · UTC+09:00
London · British Summer Time
21:55:28
Sunday, May 10, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: JST (Tokyo)
To: BST (London)
--:--

Daylight Saving status right now

JST (Japan Standard Time)
Observes DST
No
BST (British Summer Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00

Heads up: BST observes DST while JST does not. The 8-hour difference shown above will shift by one hour when BST starts or ends DST.

When can JST and BST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
JST
BST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Tokyo (JST). Each row shows the local working-hours state in that zone for the same moment in time.
No overlap during strict 9-5 working hours; some flexibility needed.
If both sides are willing to extend to 8am-7pm, the available window is 16:00–18:00 JST (08:00–10:00 BST).

Hour-by-hour JST to BST conversion table

JST time (Tokyo)BST time (London)Status
00:00 Mon16:00 SunBST working
01:00 Mon17:00 SunOff-hours both sides
02:00 Mon18:00 SunOff-hours both sides
03:00 Mon19:00 SunOff-hours both sides
04:00 Mon20:00 SunOff-hours both sides
05:00 Mon21:00 SunOff-hours both sides
06:00 Mon22:00 SunOff-hours both sides
07:00 Mon23:00 SunOff-hours both sides
08:00 Mon00:00 MonOff-hours both sides
09:00 Mon01:00 MonJST working
10:00 Mon02:00 MonJST working
11:00 Mon03:00 MonJST working
12:00 Mon04:00 MonJST working
13:00 Mon05:00 MonJST working
14:00 Mon06:00 MonJST working
15:00 Mon07:00 MonJST working
16:00 Mon08:00 MonJST working
17:00 Mon09:00 MonBST working
18:00 Mon10:00 MonBST working
19:00 Mon11:00 MonBST working
20:00 Mon12:00 MonBST working
21:00 Mon13:00 MonBST working
22:00 Mon14:00 MonBST working
23:00 Mon15:00 MonBST working

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Japan Standard Time (JST)
IANA identifier
Asia/Tokyo
Current UTC offset
UTC+09:00
Current abbreviation
GMT+9
Major cities in this zone
TokyoOsakaKyotoYokohama
British Summer Time (BST)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham

Sun today in Tokyo and London

Tokyo
Sunrise
04:41
Sunset
18:36
Solar noon
11:39
Daylight
13h 55m
London
Sunrise
05:18
Sunset
20:38
Solar noon
12:58
Daylight
15h 20m

Related converters

BST to JST (reverse)JST to ESTJST to PSTJST to GMTJST to UTCJST to CETEST to BSTPST to BSTGMT to BSTUTC to BSTCET to BST
Looking for local time? See time in Tokyo or time in London.

Frequently asked questions

What is the time difference between JST and BST right now?+
BST (British Summer Time) is currently 8 hours behind JST (Japan Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does JST or BST observe daylight saving time?+
JST: does not observe daylight saving time. BST: observes daylight saving time.
When is the best time to schedule a meeting between JST and BST?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 16:00–18:00 JST (08:00–10:00 BST).
What time is it in London when it is 12:00 noon in Tokyo?+
When it is 12:00 Mon in Tokyo (JST), it is 04:00 Mon in London (BST).
Which IANA time zone identifiers are used for JST and BST?+
JST maps to "Asia/Tokyo" in the IANA database. BST maps to "Europe/London". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Tokyo ahead of or behind London?+
Whether Tokyo (JST) is ahead of or behind London (BST) depends on the current UTC offsets. Right now BST is 8 hours behind JST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for JST and BST?+
JST is UTC+09:00 (GMT+9) and BST is UTC+01:00 (GMT+1). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both JST and BST?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between JST and BST is 16:00–18:00 JST.