Time in WEST and IDLW
The time difference between Western European Summer Time (WEST) and International Date Line West Time (IDLW) is 13 hours. International Date Line West Time is 13 hours behind Western European Summer Time.
This means 9am WEST is 8pm IDLW (previous day) and 5pm WEST is 4am IDLW.
Western European Summer Time
- The current local time in WEST is 12:36 pm (July 18, 2026)
- WEST time zone offset is UTC+01:00
International Date Line West Time
- The current local time in IDLW is 11:36 pm (July 18, 2026)
- IDLW time zone offset is UTC-12:00
How to convert Western European Summer Time to International Date Line West Time?
Subtract 13 hours from Western European Summer Time to get International Date Line West Time.
Time in WEST
00:00
Time in IDLW
00:00
Use the slider above to convert Western European Summer Time to International Date Line West 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
| WEST | IDLW |
|---|---|
| 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 |