Time in AST and CHAST
The time difference between Atlantic Standard Time (AST) and Chatham Standard Time (CHAST) is 16 hours 45 minutes. Chatham Standard Time is 16 hours 45 minutes ahead of Atlantic Standard Time.
This means 9am AST is 1:45am CHAST (next day) and 5pm AST is 9:45am CHAST (next day).
Atlantic Standard Time
- The current local time in AST is 2:48 pm (July 18, 2026)
- AST time zone offset is UTC-04:00
Chatham Standard Time
- The current local time in CHAST is 11:33 pm (July 18, 2026)
- CHAST time zone offset is UTC+12:45
How to convert Atlantic Standard Time to Chatham Standard Time?
Add 16 hours 45 minutes to Atlantic Standard Time to get Chatham Standard Time.
Time in AST
00:00
Time in CHAST
00:00
Use the slider above to convert Atlantic Standard Time to Chatham Standard Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| AST | CHAST |
|---|---|
| 12am | 4:45pm |
| 1am | 5:45pm |
| 2am | 6:45pm |
| 3am | 7:45pm |
| 4am | 8:45pm |
| 5am | 9:45pm |
| 6am | 10:45pm |
| 7am | 11:45pm |
| 8am | 0:45am |
| 9am | 1:45am |
| 10am | 2:45am |
| 11am | 3:45am |
| 12pm | 4:45am |
| 1pm | 5:45am |
| 2pm | 6:45am |
| 3pm | 7:45am |
| 4pm | 8:45am |
| 5pm | 9:45am |
| 6pm | 10:45am |
| 7pm | 11:45am |
| 8pm | 12:45pm |
| 9pm | 1:45pm |
| 10pm | 2:45pm |
| 11pm | 3:45pm |