Time in BIOT and IDLW
The time difference between British Indian Ocean Time (BIOT) and International Date Line West Time (IDLW) is 18 hours. International Date Line West Time is 18 hours behind British Indian Ocean Time.
This means 9am BIOT is 3pm IDLW (previous day) and 5pm BIOT is 11pm IDLW (previous day).
British Indian Ocean Time
- The current local time in BIOT is 4:33 am (July 19, 2026)
- BIOT time zone offset is UTC+06:00
International Date Line West Time
- The current local time in IDLW is 10:33 am (July 19, 2026)
- IDLW time zone offset is UTC-12:00
How to convert British Indian Ocean Time to International Date Line West Time?
Subtract 18 hours from British Indian Ocean Time to get International Date Line West Time.
Time in BIOT
00:00
Time in IDLW
00:00
Use the slider above to convert British Indian Ocean 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
| BIOT | IDLW |
|---|---|
| 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 |