How to read it
Abu Dhabi 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: 16:00–17:00 in Abu Dhabi, which is 07:00–08:00 in Chicago.
Through the year
How the gap between Abu Dhabi and Chicago moves
Chicago is 9h behind Abu Dhabi today. Daylight saving moves it:
- Chicago 9h behind Abu Dhabi
- Chicago 10h behind Abu Dhabi
- Sun, 1 Nov 2026 Chicago's clocks go back an hour. Chicago is then 10h behind Abu Dhabi.
- Sun, 14 Mar 2027 Chicago's clocks go forward an hour. Chicago is then 9h behind Abu Dhabi.
Hour by hour
Abu Dhabi 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.
- Abu Dhabi starts work 09:00 00:00 in Chicago Asleep
- Chicago starts work 09:00 18:00 in Abu Dhabi Late
- Abu Dhabi finishes work 18:00 09:00 in Chicago At desk
- Chicago finishes work 18:00 03:00 Wed in Abu Dhabi Asleep
Show all 24 hours
| Abu Dhabi | Chicago |
|---|---|
| 00:00 Asleep | 15:00 Tue At desk |
| 01:00 Asleep | 16:00 Tue At desk |
| 02:00 Asleep | 17:00 Tue At desk |
| 03:00 Asleep | 18:00 Tue Late |
| 04:00 Asleep | 19:00 Tue Late |
| 05:00 Asleep | 20:00 Tue Late |
| 06:00 Asleep | 21:00 Tue Late |
| 07:00 Early | 22:00 Tue Asleep |
| 08:00 Early | 23:00 Tue Asleep |
| 09:00 At desk | 00:00 Asleep |
| 10:00 At desk | 01:00 Asleep |
| 11:00 At desk | 02:00 Asleep |
| 12:00 At desk | 03:00 Asleep |
| 13:00 At desk | 04:00 Asleep |
| 14:00 At desk | 05:00 Asleep |
| 15:00 At desk | 06:00 Asleep |
| 16:00 At desk | 07:00 Early |
| 17:00 At desk | 08:00 Early |
| 18:00 Late | 09:00 At desk |
| 19:00 Late | 10:00 At desk |
| 20:00 Late | 11:00 At desk |
| 21:00 Late | 12:00 At desk |
| 22:00 Asleep | 13:00 At desk |
| 23:00 Asleep | 14:00 At desk |
Questions
Questions people ask
What is the time difference between Abu Dhabi and Chicago?
Chicago is 9h behind Abu Dhabi (as of Wed, 21 Oct 2026). That changes on Sun, 1 Nov 2026, when Chicago's clocks go back: then Chicago is 10h behind Abu Dhabi.
What is the best time for a call between Abu Dhabi and Chicago?
On a working day, the best time for a call is 16:00–17:00 in Abu Dhabi (07:00–08:00 in Chicago) until 31 Oct 2026 and from 14 Mar 2027, and 19:00–20:00 in Abu Dhabi (09:00–10:00 in Chicago) from 1 Nov 2026 to 13 Mar 2027.
Does Abu Dhabi change its clocks?
No. Abu Dhabi stays on UTC+4 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
Abu Dhabi and…
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- Abu Dhabi and London
- Abu Dhabi and Paris
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Chicago and…
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- Chicago and New York
- Chicago and Toronto
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- 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.