Time in CST and AST
The time difference between Central Standard Time (CST) and Atlantic Standard Time (AST) is 2 hours. Atlantic Standard Time is 2 hours ahead of Central Standard Time.
This means 9am CST is 11am AST and 5pm CST is 7pm AST.
Central Standard Time
- The current local time in CST is 2:27 pm (June 18, 2026)
- CST time zone offset is UTC-06:00
Atlantic Standard Time
- The current local time in AST is 12:27 pm (June 18, 2026)
- AST time zone offset is UTC-04:00
How to convert Central Standard Time to Atlantic Standard Time?
Add 2 hours to Central Standard Time to get Atlantic Standard Time.
Time in CST
00:00
Time in AST
00:00
Use the slider above to convert Central 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
| CST | AST |
|---|---|
| 12am | 2am |
| 1am | 3am |
| 2am | 4am |
| 3am | 5am |
| 4am | 6am |
| 5am | 7am |
| 6am | 8am |
| 7am | 9am |
| 8am | 10am |
| 9am | 11am |
| 10am | 12pm |
| 11am | 1pm |
| 12pm | 2pm |
| 1pm | 3pm |
| 2pm | 4pm |
| 3pm | 5pm |
| 4pm | 6pm |
| 5pm | 7pm |
| 6pm | 8pm |
| 7pm | 9pm |
| 8pm | 10pm |
| 9pm | 11pm |
| 10pm | 12am |
| 11pm | 1am |