AST to CHAST Converter
Atlantic Time
10:50:19 AM AST
Friday, November 13, 2026
17h 45m
17h 45m
Chatham Islands
4:35:19 AM GMT+13:45
Saturday, November 14, 2026
Chatham Islands (CHAST / CHADT) is 17.75 hours ahead of Atlantic Time (AST / ADT).
Quick Reference
- Atlantic Time
- AST (GMT-4)
ADT starts on Mar 14, 2027
- Chatham Islands
- GMT+13:45
GMT+12:45 starts on Apr 3, 2027
Cities in AST
Cities in CHAST
Frequently Asked Questions
- What is the difference between AST and CHAST?
- CHAST is 17.75 hours ahead of AST.
- How do I convert AST to CHAST?
- To convert from AST to CHAST, add 17.75 hours. Use the interactive converter on this page to convert specific times.
- What cities are in AST and CHAST?
- Cities in AST include Halifax, Charlottetown. Cities in CHAST include .