Time in CHAST and AST
The time difference between Chatham Standard Time (CHAST) and Atlantic Standard Time (AST) is 16 hours 45 minutes. Atlantic Standard Time is 16 hours 45 minutes behind Chatham Standard Time.
This means 9am CHAST is 4:15pm AST (previous day) and 5pm CHAST is 12:15am AST.
Chatham Standard Time
- The current local time in CHAST is 11:35 am (June 4, 2026)
- CHAST time zone offset is UTC+12:45
Atlantic Standard Time
- The current local time in AST is 2:50 am (June 4, 2026)
- AST time zone offset is UTC-04:00
How to convert Chatham Standard Time to Atlantic Standard Time?
Subtract 16 hours 45 minutes from Chatham Standard Time to get Atlantic Standard Time.
Time in CHAST
00:00
Time in AST
00:00
Use the slider above to convert Chatham Standard Time to Atlantic 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
| CHAST | AST |
|---|---|
| 12am | 7:15am |
| 1am | 8:15am |
| 2am | 9:15am |
| 3am | 10:15am |
| 4am | 11:15am |
| 5am | 12:15pm |
| 6am | 1:15pm |
| 7am | 2:15pm |
| 8am | 3:15pm |
| 9am | 4:15pm |
| 10am | 5:15pm |
| 11am | 6:15pm |
| 12pm | 7:15pm |
| 1pm | 8:15pm |
| 2pm | 9:15pm |
| 3pm | 10:15pm |
| 4pm | 11:15pm |
| 5pm | 0:15am |
| 6pm | 1:15am |
| 7pm | 2:15am |
| 8pm | 3:15am |
| 9pm | 4:15am |
| 10pm | 5:15am |
| 11pm | 6:15am |