Offset
The time difference between Riyadh and Chicago is 8 hours.
Riyadh (AST) is ahead of Chicago (CDT).
AST: UTC+3
CDT: UTC-5
Chicago is currently observing daylight saving time; Riyadh is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Riyadh and Chicago don't overlap on the same weekday. Chicago is 8 hours behind Riyadh.
With some flexibility, there’s a workable window outside standard hours:
- 3 PM–8 PM in Riyadh (7 AM–12 PM in Chicago) — suggest 5:00 PM Riyadh (9:00 AM Chicago).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Note: the working week in Saudi Arabia runs Sunday–Thursday; Friday–Saturday is the weekend, so overlap on those days is limited.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Riyadh | Chicago | Day |
|---|---|---|
| 12:00 am | 4:00 pm | -1 day |
| 1:00 am | 5:00 pm | -1 day |
| 2:00 am | 6:00 pm | -1 day |
| 3:00 am | 7:00 pm | -1 day |
| 4:00 am | 8:00 pm | -1 day |
| 5:00 am | 9:00 pm | -1 day |
| 6:00 am | 10:00 pm | -1 day |
| 7:00 am | 11:00 pm | -1 day |
| 8:00 am | 12:00 am | Same day |
| 9:00 am | 1:00 am | Same day |
| 10:00 am | 2:00 am | Same day |
| 11:00 am | 3:00 am | Same day |
| 12:00 pm | 4:00 am | Same day |
| 1:00 pm | 5:00 am | Same day |
| 2:00 pm | 6:00 am | Same day |
| 3:00 pm | 7:00 am | Same day |
| 4:00 pm | 8:00 am | Same day |
| 5:00 pm | 9:00 am | Same day |
| 6:00 pm | 10:00 am | Same day |
| 7:00 pm | 11:00 am | Same day |
| 8:00 pm | 12:00 pm | Same day |
| 9:00 pm | 1:00 pm | Same day |
| 10:00 pm | 2:00 pm | Same day |
| 11:00 pm | 3:00 pm | Same day |
Daylight saving time
Chicago observes daylight saving time; Riyadh does not. The offset between the two zones changes when Chicago transitions: on Sunday, November 1, 2026, clocks fall back from CDT to CST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:05 AM
- Sunset
- 6:40 PM
- Day length
- 13h 36m
- Sunrise
- 5:18 AM
- Sunset
- 8:22 PM
- Day length
- 15h 4m
Cities in these zones
Other cities in Central Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Arabia Standard Time
- JED
- RUH
- MED
- DMM
Airports in Central Time
- GYY
- MDW
- ORD
- HOU
- IAH
- SAT
- DAL
- DFW
- AUS
- BNA
Related conversions
Common conversions
- What is 9:00 am Riyadh in Chicago?
- 9:00 am Riyadh is 1:00 am Chicago.
- What is 12:00 pm Riyadh in Chicago?
- 12:00 pm Riyadh is 4:00 am Chicago.
- What is 12:30 pm Riyadh in Chicago?
- 12:30 pm Riyadh is 4:30 am Chicago.
- What is 2:00 pm Riyadh in Chicago?
- 2:00 pm Riyadh is 6:00 am Chicago.
- What is 5:00 pm Riyadh in Chicago?
- 5:00 pm Riyadh is 9:00 am Chicago.
- What is 11:30 pm Riyadh in Chicago?
- 11:30 pm Riyadh is 3:30 pm Chicago.