Time in CST and AST
The time difference between China Standard Time (CST) and Atlantic Standard Time (AST) is 12 hours. Atlantic Standard Time is 12 hours behind China Standard Time.
This means 9am CST is 9pm AST (previous day) and 5pm CST is 5am AST.
China Standard Time
- The current local time in CST is 8:37 pm (July 18, 2026)
- CST time zone offset is UTC+08:00
Atlantic Standard Time
- The current local time in AST is 4:37 pm (July 18, 2026)
- AST time zone offset is UTC-04:00
How to convert China Standard Time to Atlantic Standard Time?
Subtract 12 hours from China Standard Time to get Atlantic Standard Time.
Time in CST
00:00
Time in AST
00:00
Use the slider above to convert China 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 | 12pm |
| 1am | 1pm |
| 2am | 2pm |
| 3am | 3pm |
| 4am | 4pm |
| 5am | 5pm |
| 6am | 6pm |
| 7am | 7pm |
| 8am | 8pm |
| 9am | 9pm |
| 10am | 10pm |
| 11am | 11pm |
| 12pm | 12am |
| 1pm | 1am |
| 2pm | 2am |
| 3pm | 3am |
| 4pm | 4am |
| 5pm | 5am |
| 6pm | 6am |
| 7pm | 7am |
| 8pm | 8am |
| 9pm | 9am |
| 10pm | 10am |
| 11pm | 11am |