Time in BIOT and COST
The time difference between British Indian Ocean Time (BIOT) and Colombia Summer Time (COST) is 10 hours. Colombia Summer Time is 10 hours behind British Indian Ocean Time.
This means 9am BIOT is 11pm COST (previous day) and 5pm BIOT is 7am COST.
British Indian Ocean Time
- The current local time in BIOT is 4:32 am (July 19, 2026)
- BIOT time zone offset is UTC+06:00
Colombia Summer Time
- The current local time in COST is 2:32 am (July 19, 2026)
- COST time zone offset is UTC-04:00
How to convert British Indian Ocean Time to Colombia Summer Time?
Subtract 10 hours from British Indian Ocean Time to get Colombia Summer Time.
Time in BIOT
00:00
Time in COST
00:00
Use the slider above to convert British Indian Ocean Time to Colombia 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
| BIOT | COST |
|---|---|
| 12am | 2pm |
| 1am | 3pm |
| 2am | 4pm |
| 3am | 5pm |
| 4am | 6pm |
| 5am | 7pm |
| 6am | 8pm |
| 7am | 9pm |
| 8am | 10pm |
| 9am | 11pm |
| 10am | 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 |