How to read it
Tokyo and London, side by side
Each row is one city's day, half an hour to a square, lined up by the hours along the bottom.
- 1Filled: at the desk, 9:00 to 18:00 where that city is.
- 2Grey: up early, up late, or the weekend.
- 3Outline: asleep.
- 4Red band: your slot. Read straight down to see the same moment in every city.
- 5A marks the best time for everyone; B, when there is one, the next best.
The red band is the best time to call on Wed, 21 Oct 2026: 17:00–18:00 in Tokyo, which is 09:00–10:00 in London.
Through the year
How the gap between Tokyo and London moves
London is 8h behind Tokyo today. Daylight saving moves it:
- London 8h behind Tokyo
- London 9h behind Tokyo
- Sun, 25 Oct 2026 London's clocks go back an hour. London is then 9h behind Tokyo.
- Sun, 28 Mar 2027 London's clocks go forward an hour. London is then 8h behind Tokyo.
Hour by hour
Tokyo to London time, hour by hour
On a working day (Wed, 21 Oct 2026), with working hours of 9:00 to 18:00 in both cities.
- Tokyo starts work 09:00 01:00 in London Asleep
- London starts work 09:00 17:00 in Tokyo At desk
- Tokyo finishes work 18:00 10:00 in London At desk
- London finishes work 18:00 02:00 Wed in Tokyo Asleep
Show all 24 hours
| Tokyo | London |
|---|---|
| 00:00 Asleep | 16:00 Tue At desk |
| 01:00 Asleep | 17:00 Tue At desk |
| 02:00 Asleep | 18:00 Tue Late |
| 03:00 Asleep | 19:00 Tue Late |
| 04:00 Asleep | 20:00 Tue Late |
| 05:00 Asleep | 21:00 Tue Late |
| 06:00 Asleep | 22:00 Tue Asleep |
| 07:00 Early | 23:00 Tue Asleep |
| 08:00 Early | 00:00 Asleep |
| 09:00 At desk | 01:00 Asleep |
| 10:00 At desk | 02:00 Asleep |
| 11:00 At desk | 03:00 Asleep |
| 12:00 At desk | 04:00 Asleep |
| 13:00 At desk | 05:00 Asleep |
| 14:00 At desk | 06:00 Asleep |
| 15:00 At desk | 07:00 Early |
| 16:00 At desk | 08:00 Early |
| 17:00 At desk | 09:00 At desk |
| 18:00 Late | 10:00 At desk |
| 19:00 Late | 11:00 At desk |
| 20:00 Late | 12:00 At desk |
| 21:00 Late | 13:00 At desk |
| 22:00 Asleep | 14:00 At desk |
| 23:00 Asleep | 15:00 At desk |
Questions
Questions people ask
What is the time difference between Tokyo and London?
London is 8h behind Tokyo (as of Wed, 21 Oct 2026). That changes on Sun, 25 Oct 2026, when London's clocks go back: then London is 9h behind Tokyo.
What is the best time for a call between Tokyo and London?
On a working day, the best time for a call is 17:00–18:00 in Tokyo (09:00–10:00 in London) until 24 Oct 2026 and from 28 Mar 2027, and 16:00–17:00 in Tokyo (07:00–08:00 in London) from 25 Oct 2026 to 27 Mar 2027.
Does Tokyo change its clocks?
No. Tokyo stays on UTC+9 all year.
Does London change its clocks?
Yes. London moves its clocks back an hour on Sun, 25 Oct 2026, and forward an hour on Sun, 28 Mar 2027.
More city pairs
Compare more cities
Tokyo and…
- Tokyo and Mumbai
- Tokyo and Delhi
- Tokyo and Bengaluru
- Tokyo and Dubai
- Tokyo and Abu Dhabi
- Tokyo and Riyadh
- Tokyo and Doha
- Tokyo and Singapore
- Tokyo and Hong Kong
- Tokyo and Sydney
- Tokyo and Paris
- Tokyo and Berlin
- Tokyo and Amsterdam
- Tokyo and New York
- Tokyo and Toronto
- Tokyo and Chicago
- Tokyo and Los Angeles
- Tokyo and San Francisco
London and…
- London and Mumbai
- London and Delhi
- London and Bengaluru
- London and Dubai
- London and Abu Dhabi
- London and Riyadh
- London and Doha
- London and Singapore
- London and Hong Kong
- London and Sydney
- London and Paris
- London and Berlin
- London and Amsterdam
- London and New York
- London and Toronto
- London and Chicago
- London and Los Angeles
- London and San Francisco
From the team behind 10:10
Running an event across time zones?
C4E has spent twenty years running conferences, dealer meets and offsites in more than 40 countries, with clients, speakers and crews in different time zones. 10:10 is one of the tools we built for our own shows. It is free, with no account and nothing upsold.