AST to CDT Time Converter
Arabia Standard Time → Central Daylight Time
AST = UTC+3CDT = UTC-5
⚠️ AST is ambiguous — on this page it means Arabia Standard Time. It also refers to:
AST (Riyadh) ↔ CDT (Chicago)
No overlap — one side will join outside working hours
AST (Riyadh)
CDT (Chicago)
Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.
Frequently Asked Questions
What is the difference between ast and cdt?
Arabia Standard Time (ast) is UTC+3 and Central Daylight Time (cdt) is UTC-5. The difference between them is 8 hours.
Where is ast used?
Arabia Standard Time (ast) is used in Saudi Arabia and surrounding regions. The IANA timezone identifier is Asia/Riyadh. Note: ast is ambiguous and may refer to other timezones.
Where is cdt used?
Central Daylight Time (cdt) is used in USA and surrounding regions. The IANA timezone identifier is America/Chicago.
How do I convert ast to cdt?
Use the interactive converter above. Drag the time slider to any ast time and the cdt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
Popular AST conversions
AST → LondonAST → New YorkAST → TokyoAST → DubaiAST → SydneyAST → ParisAST → BerlinAST → SingaporeAST → Los AngelesAST → Toronto