Time in JST and HDT
The time difference between Japan Standard Time (JST) and Hawaii–Aleutian Daylight Time (HDT) is 18 hours. Hawaii–Aleutian Daylight Time is 18 hours behind Japan Standard Time.
This means 9am JST is 3pm HDT (previous day) and 5pm JST is 11pm HDT (previous day).
Japan Standard Time
- The current local time in JST is 4:12 am (July 9, 2026)
- JST time zone offset is UTC+09:00
Hawaii–Aleutian Daylight Time
- The current local time in HDT is 4:12 am (July 9, 2026)
- HDT time zone offset is UTC-09:00
How to convert Japan Standard Time to Hawaii–Aleutian Daylight Time?
Subtract 18 hours from Japan Standard Time to get Hawaii–Aleutian Daylight Time.
Time in JST
00:00
Time in HDT
00:00
Use the slider above to convert Japan Standard Time to Hawaii–Aleutian Daylight 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
| JST | HDT |
|---|---|
| 12am | 6am |
| 1am | 7am |
| 2am | 8am |
| 3am | 9am |
| 4am | 10am |
| 5am | 11am |
| 6am | 12pm |
| 7am | 1pm |
| 8am | 2pm |
| 9am | 3pm |
| 10am | 4pm |
| 11am | 5pm |
| 12pm | 6pm |
| 1pm | 7pm |
| 2pm | 8pm |
| 3pm | 9pm |
| 4pm | 10pm |
| 5pm | 11pm |
| 6pm | 12am |
| 7pm | 1am |
| 8pm | 2am |
| 9pm | 3am |
| 10pm | 4am |
| 11pm | 5am |