AST to JST Time Converter

When it is 9:00 AM AST, it is 9:00 PM JST. Atlantic Standard Time (AST, UTC-4) and Japan Standard Time (JST, UTC+9) are 13 hours apart.

AST to JST Conversion Table

What is the time difference between AST and JST?

Atlantic Standard Time (AST) is UTC-4 and Japan Standard Time (JST) is UTC+9. The exact difference can vary due to Daylight Saving Time changes. Our converter automatically accounts for current DST rules to give you accurate conversions.

When is 9 AM AST in JST?

Use the conversion table above to find common time mappings between AST and JST. For precise conversions including DST adjustments, use the interactive converter.

Does AST observe Daylight Saving Time?

Atlantic Standard Time (AST) is based on the America/Halifax timezone. DST observance depends on local regulations. Our converter automatically accounts for current DST rules.