AST to CST Converter
Central Time (CST / CDT) is 2 hours behind Atlantic Time (AST / ADT).
Quick Reference
- Atlantic Time
- ADT (GMT-3)
AST starts on Nov 1, 2026
- Central Time
- CDT (GMT-5)
CST starts on Nov 1, 2026
Cities in AST
Cities in CST
Frequently Asked Questions
- What is the difference between AST and CST?
- CST is 2 hours behind AST.
- How do I convert AST to CST?
- To convert from AST to CST, subtract 2 hours. Use the interactive converter on this page to convert specific times.
- What cities are in AST and CST?
- Cities in AST include Halifax, Charlottetown. Cities in CST include Chicago, Houston, San Antonio, Dallas, Fort Worth.