Time in KST and AST
The time difference between Korea Standard Time (KST) and Atlantic Standard Time (AST) is 13 hours. Atlantic Standard Time is 13 hours behind Korea Standard Time.
This means 9am KST is 8pm AST (previous day) and 5pm KST is 4am AST.
Korea Standard Time
- The current local time in KST is 11:18 pm (September 29, 2026)
- KST time zone offset is UTC+09:00
Atlantic Standard Time
- The current local time in AST is 6:18 pm (September 29, 2026)
- AST time zone offset is UTC-04:00
How to convert Korea Standard Time to Atlantic Standard Time?
Subtract 13 hours from Korea Standard Time to get Atlantic Standard Time.
Time in KST
00:00
Time in AST
00:00
Use the slider above to convert Korea 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
| KST | AST |
|---|---|
| 12am | 11am |
| 1am | 12pm |
| 2am | 1pm |
| 3am | 2pm |
| 4am | 3pm |
| 5am | 4pm |
| 6am | 5pm |
| 7am | 6pm |
| 8am | 7pm |
| 9am | 8pm |
| 10am | 9pm |
| 11am | 10pm |
| 12pm | 11pm |
| 1pm | 12am |
| 2pm | 1am |
| 3pm | 2am |
| 4pm | 3am |
| 5pm | 4am |
| 6pm | 5am |
| 7pm | 6am |
| 8pm | 7am |
| 9pm | 8am |
| 10pm | 9am |
| 11pm | 10am |