Time in COST and BIOT
The time difference between Colombia Summer Time (COST) and British Indian Ocean Time (BIOT) is 10 hours. British Indian Ocean Time is 10 hours ahead of Colombia Summer Time.
This means 9am COST is 7pm BIOT and 5pm COST is 3am BIOT (next day).
Colombia Summer Time
- The current local time in COST is 5:34 pm (July 18, 2026)
- COST time zone offset is UTC-04:00
British Indian Ocean Time
- The current local time in BIOT is 7:34 pm (July 18, 2026)
- BIOT time zone offset is UTC+06:00
How to convert Colombia Summer Time to British Indian Ocean Time?
Add 10 hours to Colombia Summer Time to get British Indian Ocean Time.
Time in COST
00:00
Time in BIOT
00:00
Use the slider above to convert Colombia Summer 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
| COST | BIOT |
|---|---|
| 12am | 10am |
| 1am | 11am |
| 2am | 12pm |
| 3am | 1pm |
| 4am | 2pm |
| 5am | 3pm |
| 6am | 4pm |
| 7am | 5pm |
| 8am | 6pm |
| 9am | 7pm |
| 10am | 8pm |
| 11am | 9pm |
| 12pm | 10pm |
| 1pm | 11pm |
| 2pm | 12am |
| 3pm | 1am |
| 4pm | 2am |
| 5pm | 3am |
| 6pm | 4am |
| 7pm | 5am |
| 8pm | 6am |
| 9pm | 7am |
| 10pm | 8am |
| 11pm | 9am |