How to read it
Hong Kong and Tokyo, 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: 09:00–10:00 in Hong Kong, which is 10:00–11:00 in Tokyo.
Through the year
How the gap between Hong Kong and Tokyo moves
Tokyo is 1h ahead of Hong Kong today. Neither city changes its clocks, so the gap is the same all year.
- Tokyo 1h ahead of Hong Kong
Hour by hour
Hong Kong to Tokyo time, hour by hour
On a working day (Wed, 21 Oct 2026), with working hours of 9:00 to 18:00 in both cities.
- Hong Kong starts work 09:00 10:00 in Tokyo At desk
- Tokyo starts work 09:00 08:00 in Hong Kong Early
- Hong Kong finishes work 18:00 19:00 in Tokyo Late
- Tokyo finishes work 18:00 17:00 in Hong Kong At desk
Show all 24 hours
| Hong Kong | Tokyo |
|---|---|
| 00:00 Asleep | 01:00 Asleep |
| 01:00 Asleep | 02:00 Asleep |
| 02:00 Asleep | 03:00 Asleep |
| 03:00 Asleep | 04:00 Asleep |
| 04:00 Asleep | 05:00 Asleep |
| 05:00 Asleep | 06:00 Asleep |
| 06:00 Asleep | 07:00 Early |
| 07:00 Early | 08:00 Early |
| 08:00 Early | 09:00 At desk |
| 09:00 At desk | 10:00 At desk |
| 10:00 At desk | 11:00 At desk |
| 11:00 At desk | 12:00 At desk |
| 12:00 At desk | 13:00 At desk |
| 13:00 At desk | 14:00 At desk |
| 14:00 At desk | 15:00 At desk |
| 15:00 At desk | 16:00 At desk |
| 16:00 At desk | 17:00 At desk |
| 17:00 At desk | 18:00 Late |
| 18:00 Late | 19:00 Late |
| 19:00 Late | 20:00 Late |
| 20:00 Late | 21:00 Late |
| 21:00 Late | 22:00 Asleep |
| 22:00 Asleep | 23:00 Asleep |
| 23:00 Asleep | 00:00 Thu Asleep |
Questions
Questions people ask
What is the time difference between Hong Kong and Tokyo?
Tokyo is 1h ahead of Hong Kong (as of Wed, 21 Oct 2026). Neither city changes its clocks, so the gap is the same all year.
What is the best time for a call between Hong Kong and Tokyo?
On a working day, the best time for a call is 09:00–10:00 in Hong Kong, which is 10:00–11:00 in Tokyo. Everyone is at their desk.
Does Hong Kong change its clocks?
No. Hong Kong stays on UTC+8 all year.
Does Tokyo change its clocks?
No. Tokyo stays on UTC+9 all year.
More city pairs
Compare more cities
Hong Kong and…
- Hong Kong and Mumbai
- Hong Kong and Delhi
- Hong Kong and Bengaluru
- Hong Kong and Dubai
- Hong Kong and Abu Dhabi
- Hong Kong and Riyadh
- Hong Kong and Doha
- Hong Kong and Singapore
- Hong Kong and Sydney
- Hong Kong and London
- Hong Kong and Paris
- Hong Kong and Berlin
- Hong Kong and Amsterdam
- Hong Kong and New York
- Hong Kong and Toronto
- Hong Kong and Chicago
- Hong Kong and Los Angeles
- Hong Kong and San Francisco
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 Sydney
- Tokyo and London
- 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
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.