Time in IDLW and BST
The time difference between International Date Line West Time (IDLW) and British Summer Time (BST) is 13 hours. British Summer Time is 13 hours ahead of International Date Line West Time.
This means 9am IDLW is 10pm BST and 5pm IDLW is 6am BST (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
British Summer Time
- The current local time in BST is 1:36 pm (July 18, 2026)
- BST time zone offset is UTC+01:00
How to convert International Date Line West Time to British Summer Time?
Add 13 hours to International Date Line West Time to get British Summer Time.
Time in IDLW
00:00
Time in BST
00:00
Use the slider above to convert International Date Line West Time to British Summer 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 | BST |
|---|---|
| 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 |