Time in IDLW and BIOT
The time difference between International Date Line West Time (IDLW) and British Indian Ocean Time (BIOT) is 18 hours. British Indian Ocean Time is 18 hours ahead of International Date Line West Time.
This means 9am IDLW is 3am BIOT (next day) and 5pm IDLW is 11am BIOT (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 Indian Ocean Time
- The current local time in BIOT is 6:36 pm (July 18, 2026)
- BIOT time zone offset is UTC+06:00
How to convert International Date Line West Time to British Indian Ocean Time?
Add 18 hours to International Date Line West Time to get British Indian Ocean Time.
Time in IDLW
00:00
Time in BIOT
00:00
Use the slider above to convert International Date Line West Time to British Indian Ocean 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 | BIOT |
|---|---|
| 12am | 6pm |
| 1am | 7pm |
| 2am | 8pm |
| 3am | 9pm |
| 4am | 10pm |
| 5am | 11pm |
| 6am | 12am |
| 7am | 1am |
| 8am | 2am |
| 9am | 3am |
| 10am | 4am |
| 11am | 5am |
| 12pm | 6am |
| 1pm | 7am |
| 2pm | 8am |
| 3pm | 9am |
| 4pm | 10am |
| 5pm | 11am |
| 6pm | 12pm |
| 7pm | 1pm |
| 8pm | 2pm |
| 9pm | 3pm |
| 10pm | 4pm |
| 11pm | 5pm |