Chicago
Riyadh
Convert CST to AST
Central Standard Time to Arabia Standard Time — Riyadh is 8 hours ahead of Chicago
Quick Facts
Time Difference
+8 hours
CST Full Name
Central Standard Time
AST Full Name
Arabia Standard Time
CST to AST Conversion Table
Related Conversions
About CST and AST Time Zones
CST (Central Standard Time) is UTC-6 and covers cities like Chicago, Dallas, Houston. AST (Arabia Standard Time) is UTC+3 and covers cities like Riyadh, Jeddah, Baghdad.
When it's 12:00 PM (noon) in Chicago (CST), it's 8:00 PM in Riyadh (AST). The time difference between CST and AST is 8 hours — Riyadh is ahead of Chicago.
A workday starting at 9 AM in Chicago corresponds to 6:00 PM in Riyadh, giving a short overlap window for morning meetings.
Daylight Saving Time
CST observes Daylight Saving Time and becomes CDT (Central Daylight Time) during summer months, shifting clocks forward by 1 hour to UTC-5.
During DST transitions, the time difference between CST and AST may shift by ±1 hour. Always verify the current offset above for the most accurate conversion.
Use our world clock tool to compare Chicago and Riyadh with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between CST and AST?
Riyadh (AST) is 8 hours ahead of Chicago (CST). The offset is +8 hours.
Is AST ahead or behind CST?
AST is 8 hours ahead of CST. CST is UTC-5 and AST is UTC+3.
When it's 12:00 PM in Chicago, what time is it in Riyadh?
When it's 12:00 PM (noon) in Chicago (CST), it's 8:00 PM in Riyadh (AST).
When it's 5:00 PM in Chicago, what time is it in Riyadh?
When it's 5:00 PM in Chicago (CST), it's 1:00 AM in Riyadh (AST).
Does CST change for Daylight Saving Time?
Yes. CST (Central Standard Time, UTC-6) becomes CDT (Central Daylight Time, UTC-5) in summer, shifting clocks forward 1 hour.