Time in AST and JST
The time difference between Atlantic Standard Time (AST) and Japan Standard Time (JST) is 13 hours. Japan Standard Time is 13 hours ahead of Atlantic Standard Time.
This means 9am AST is 10pm JST and 5pm AST is 6am JST (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
Japan Standard Time
- The current local time in JST is 7:48 pm (July 18, 2026)
- JST time zone offset is UTC+09:00
How to convert Atlantic Standard Time to Japan Standard Time?
Add 13 hours to Atlantic Standard Time to get Japan Standard Time.
Time in AST
00:00
Time in JST
00:00
Use the slider above to convert Atlantic Standard Time to Japan 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 | JST |
|---|---|
| 12am | 1pm |
| 1am | 2pm |
| 2am | 3pm |
| 3am | 4pm |
| 4am | 5pm |
| 5am | 6pm |
| 6am | 7pm |
| 7am | 8pm |
| 8am | 9pm |
| 9am | 10pm |
| 10am | 11pm |
| 11am | 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 |