Time in IDLW and JST
The time difference between International Date Line West Time (IDLW) and Japan Standard Time (JST) is 21 hours. Japan Standard Time is 21 hours ahead of International Date Line West Time.
This means 9am IDLW is 6am JST (next day) and 5pm IDLW is 2pm JST (next day).
International Date Line West Time
- The current local time in IDLW is 12:36 am (July 19, 2026)
- IDLW time zone offset is UTC-12:00
Japan Standard Time
- The current local time in JST is 9:36 pm (July 18, 2026)
- JST time zone offset is UTC+09:00
How to convert International Date Line West Time to Japan Standard Time?
Add 21 hours to International Date Line West Time to get Japan Standard Time.
Time in IDLW
00:00
Time in JST
00:00
Use the slider above to convert International Date Line West 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
| IDLW | JST |
|---|---|
| 12am | 9pm |
| 1am | 10pm |
| 2am | 11pm |
| 3am | 12am |
| 4am | 1am |
| 5am | 2am |
| 6am | 3am |
| 7am | 4am |
| 8am | 5am |
| 9am | 6am |
| 10am | 7am |
| 11am | 8am |
| 12pm | 9am |
| 1pm | 10am |
| 2pm | 11am |
| 3pm | 12pm |
| 4pm | 1pm |
| 5pm | 2pm |
| 6pm | 3pm |
| 7pm | 4pm |
| 8pm | 5pm |
| 9pm | 6pm |
| 10pm | 7pm |
| 11pm | 8pm |