How to read it
Riyadh 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: 17:00–18:00 in Riyadh, which is 09:00–10:00 in Chicago.
Through the year
How the gap between Riyadh and Chicago moves
Chicago is 8h behind Riyadh today. Daylight saving moves it:
- Chicago 8h behind Riyadh
- Chicago 9h behind Riyadh
- Sun, 1 Nov 2026 Chicago's clocks go back an hour. Chicago is then 9h behind Riyadh.
- Sun, 14 Mar 2027 Chicago's clocks go forward an hour. Chicago is then 8h behind Riyadh.
Hour by hour
Riyadh 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. Riyadh works Sun–Thu and Chicago works Mon–Fri, so the shared working days are Mon–Thu.
- Riyadh starts work 09:00 01:00 in Chicago Asleep
- Chicago starts work 09:00 17:00 in Riyadh At desk
- Riyadh finishes work 18:00 10:00 in Chicago At desk
- Chicago finishes work 18:00 02:00 Wed in Riyadh Asleep
Show all 24 hours
| Riyadh | Chicago |
|---|---|
| 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 Riyadh and Chicago?
Chicago is 8h behind Riyadh (as of Wed, 21 Oct 2026). That changes on Sun, 1 Nov 2026, when Chicago's clocks go back: then Chicago is 9h behind Riyadh.
What is the best time for a call between Riyadh and Chicago?
On a working day, the best time for a call is 17:00–18:00 in Riyadh (09:00–10:00 in Chicago) until 31 Oct 2026 and from 14 Mar 2027, and 16:00–17:00 in Riyadh (07:00–08:00 in Chicago) from 1 Nov 2026 to 13 Mar 2027. Riyadh works Sun–Thu and Chicago works Mon–Fri, so the shared working days are Mon–Thu.
Does Riyadh change its clocks?
No. Riyadh stays on UTC+3 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
Riyadh and…
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- Riyadh and London
- Riyadh and Paris
- Riyadh and Berlin
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- Riyadh and Toronto
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Chicago and…
- Chicago and Mumbai
- Chicago and Delhi
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- Chicago and Abu Dhabi
- Chicago and Doha
- Chicago and Singapore
- Chicago and Hong Kong
- Chicago and Tokyo
- 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.