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London to Tokyo Time Converter

Tokyo is 8 hours ahead of London while London is on daylight saving time (from late March to late October), and 9 hours ahead the rest of the year. Japan doesn’t use daylight saving time, which is why the gap moves.

BST · UTC+1
Mon, Oct 19
JST · UTC+9
Mon, Oct 19

On Monday, October 19, Tokyo is 8 hours ahead of London.

Heads-up: clocks in London go back on Sunday, October 25. After that, Tokyo is 9 hours ahead of London.

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Time zone rules checked October 2026. The converter runs on your device using its built-in time zone database, so it accounts for daylight saving time on any date you pick.

London and Tokyo, hour by hour

Green rows are the hours when both cities are inside an ordinary 9-to-5 working day. Change the date in the converter and this table follows it.

Hour by hour for Monday, October 19, 2026 in London
London BSTTokyo JSTOffice hours (9 AM to 5 PM, local weekdays)
12:00 AM8:00 AM
1:00 AM9:00 AMTokyo only
2:00 AM10:00 AMTokyo only
3:00 AM11:00 AMTokyo only
4:00 AM12:00 PMTokyo only
5:00 AM1:00 PMTokyo only
6:00 AM2:00 PMTokyo only
7:00 AM3:00 PMTokyo only
8:00 AM4:00 PMTokyo only
9:00 AM5:00 PMLondon only
10:00 AM6:00 PMLondon only
11:00 AM7:00 PMLondon only
12:00 PM8:00 PMLondon only
1:00 PM9:00 PMLondon only
2:00 PM10:00 PMLondon only
3:00 PM11:00 PMLondon only
4:00 PM12:00 AM next dayLondon only
5:00 PM1:00 AM next day
6:00 PM2:00 AM next day
7:00 PM3:00 AM next day
8:00 PM4:00 AM next day
9:00 PM5:00 AM next day
10:00 PM6:00 AM next day
11:00 PM7:00 AM next day

The best time for a call

A 9-to-5 day in London and one in Tokyo don’t overlap at all, so somebody has to stretch. The fairest one-hour slot is usually 8:30 AM in London, which is 4:30 PM in Tokyo. It asks London to start about half an hour early and Tokyo to stay about half an hour late.

Japan has no daylight saving time, so Tokyo is nine hours ahead of London in winter and eight during British Summer Time. The sensible window is the London early morning, when Tokyo is wrapping up.

In winter, 8 a.m. in London is 5 p.m. in Tokyo. In summer the same Tokyo 5 p.m. lands at 9 a.m. in London, so the shared slot moves with the UK clocks even though Tokyo’s never change.

Plan a meeting with London, Tokyo and other cities →

Why the time difference changes

Tokyo keeps the same time all year (UTC+9). London doesn’t: its clocks go forward on the last Sunday in March and back on the last Sunday in October. Every time London changes, the gap changes with it.

Tokyo compared with London, Oct 19, 2026 to Oct 19, 2027
FromUntilTokyo is9:00 AM in London is
TodayOct 25, 20268 hours ahead5:00 PM JST
Oct 25, 2026Mar 28, 20279 hours ahead6:00 PM JST
Mar 28, 2027—8 hours ahead5:00 PM JST

The two time zones

London

Time zone
UK time (GMT / BST)
UTC offset
UTC+0, or UTC+1 in summer
Daylight saving
Clocks go forward on the last Sunday in March and back on the last Sunday in October.
Next change
Oct 25, 2026 (clocks go back)
IANA zone
Europe/London

Tokyo

Time zone
Japan Standard Time (JST)
UTC offset
UTC+9 all year
Daylight saving
Not observed
Next change
None — no daylight saving time
IANA zone
Asia/Tokyo

Common questions

What time is it in Tokyo when it’s 9 AM in London?

5:00 PM while London is on daylight saving time, and 6:00 PM the rest of the year. Pick a date in the converter above for the exact answer.

Is Tokyo always 8 hours ahead of London?

No. Over the next twelve months it’s 8 hours most of the time, but it changes with the seasons: Oct 25 until Mar 28, 2027 (9 hours). That’s down to daylight saving time, explained above.

What’s a good time for a meeting between London and Tokyo?

A 9-to-5 day in London and one in Tokyo don’t overlap at all, so somebody has to stretch. The fairest one-hour slot is usually 8:30 AM in London, which is 4:30 PM in Tokyo. It asks London to start about half an hour early and Tokyo to stay about half an hour late.

Is Tokyo a day ahead of London?

For part of the day, yes. On a typical day, from about 4:00 PM in London onwards it’s already the next day in Tokyo. The converter and hour-by-hour table flag this with a “next day” label.

Need more than two cities? The World Time Grid lines up to five locations side by side, so you can see everyone’s day at once.

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