Best overlap: 4:00 PM to 6:00 PM in Riyadh is 8:00 AM to 10:00 AM in Chicago.
Shoot for 4:00 PM to 6:00 PM in Riyadh; your Chicago colleagues will see that as 8:00 AM to 10:00 AM. Chicago is 8 hours behind Riyadh. That's only 2 hours of overlap, so pair live calls with async follow-ups to make the most of it. Note that Chicago follows daylight saving while Riyadh stays put, so the times above drift by an hour seasonally.
| Local time | 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Riyadh Asia/Riyadh | ||||||||||||||||||||||||
Chicago America/Chicago |
London to New York is five hours apart, except for the five weeks a year when it isn't. Exact overlap windows for every US zone, the 2026 DST mismatch dates, and where to put the recurring sync. -
The Philippines sits 12 to 16 hours ahead of the US and never changes its clocks. Exact overlap windows for every US coast, the tomorrow problem, and a rotation rule that works for product and BPO teams. -
The US to Australia gap runs 14 to 19 hours depending on the month, and someone is always in tomorrow. Exact overlap windows for every US coast, the double-DST trap, and a rotation rule that keeps it fair. -