How to read it
Tokyo and Chicago, 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 Tokyo, which is 19:00–20:00 in Chicago.
Through the year
How the gap between Tokyo and Chicago moves
Chicago is 14h behind Tokyo today. Daylight saving moves it:
- Chicago 14h behind Tokyo
- Chicago 15h behind Tokyo
- Sun, 1 Nov 2026 Chicago's clocks go back an hour. Chicago is then 15h behind Tokyo.
- Sun, 14 Mar 2027 Chicago's clocks go forward an hour. Chicago is then 14h behind Tokyo.
Hour by hour
Tokyo to Chicago 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 19:00 Tue in Chicago Late
- Chicago starts work 09:00 23:00 in Tokyo Asleep
- Tokyo finishes work 18:00 04:00 in Chicago Asleep
- Chicago finishes work 18:00 08:00 Wed in Tokyo Early
Show all 24 hours
| Tokyo | Chicago |
|---|---|
| 00:00 Asleep | 10:00 Tue At desk |
| 01:00 Asleep | 11:00 Tue At desk |
| 02:00 Asleep | 12:00 Tue At desk |
| 03:00 Asleep | 13:00 Tue At desk |
| 04:00 Asleep | 14:00 Tue At desk |
| 05:00 Asleep | 15:00 Tue At desk |
| 06:00 Asleep | 16:00 Tue At desk |
| 07:00 Early | 17:00 Tue At desk |
| 08:00 Early | 18:00 Tue Late |
| 09:00 At desk | 19:00 Tue Late |
| 10:00 At desk | 20:00 Tue Late |
| 11:00 At desk | 21:00 Tue Late |
| 12:00 At desk | 22:00 Tue Asleep |
| 13:00 At desk | 23:00 Tue Asleep |
| 14:00 At desk | 00:00 Asleep |
| 15:00 At desk | 01:00 Asleep |
| 16:00 At desk | 02:00 Asleep |
| 17:00 At desk | 03:00 Asleep |
| 18:00 Late | 04:00 Asleep |
| 19:00 Late | 05:00 Asleep |
| 20:00 Late | 06:00 Asleep |
| 21:00 Late | 07:00 Early |
| 22:00 Asleep | 08:00 Early |
| 23:00 Asleep | 09:00 At desk |
Questions
Questions people ask
What is the time difference between Tokyo and Chicago?
Chicago is 14h behind Tokyo (as of Wed, 21 Oct 2026). That changes on Sun, 1 Nov 2026, when Chicago's clocks go back: then Chicago is 15h behind Tokyo.
What is the best time for a call between Tokyo and Chicago?
On a working day, the best time for a call is 09:00–10:00 in Tokyo (19:00–20:00 in Chicago) until 31 Oct 2026 and from 14 Mar 2027, and 09:00–10:00 in Tokyo (18:00–19:00 in Chicago) from 1 Nov 2026 to 13 Mar 2027.
Does Tokyo change its clocks?
No. Tokyo stays on UTC+9 all year.
Does Chicago change its clocks?
Yes. Chicago moves its clocks back an hour on Sun, 1 Nov 2026, and forward an hour on Sun, 14 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 London
- Tokyo and Paris
- Tokyo and Berlin
- Tokyo and Amsterdam
- Tokyo and New York
- Tokyo and Toronto
- Tokyo and Los Angeles
- Tokyo and San Francisco
Chicago and…
- Chicago and Mumbai
- Chicago and Delhi
- Chicago and Bengaluru
- Chicago and Dubai
- Chicago and Abu Dhabi
- Chicago and Riyadh
- Chicago and Doha
- Chicago and Singapore
- Chicago and Hong Kong
- Chicago and Sydney
- Chicago and London
- Chicago and Paris
- Chicago and Berlin
- Chicago and Amsterdam
- Chicago and New York
- Chicago and Toronto
- Chicago and Los Angeles
- Chicago 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.