Time in TOT and COST
The time difference between Tonga Time (TOT) and Colombia Summer Time (COST) is 17 hours. Colombia Summer Time is 17 hours behind Tonga Time.
This means 9am TOT is 4pm COST (previous day) and 5pm TOT is 12am COST.
Tonga Time
- The current local time in TOT is 1:42 am (July 19, 2026)
- TOT time zone offset is UTC+13:00
Colombia Summer Time
- The current local time in COST is 4:42 pm (July 18, 2026)
- COST time zone offset is UTC-04:00
How to convert Tonga Time to Colombia Summer Time?
Subtract 17 hours from Tonga Time to get Colombia Summer Time.
Time in TOT
00:00
Time in COST
00:00
Use the slider above to convert Tonga 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
| TOT | COST |
|---|---|
| 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 | 12am |
| 6pm | 1am |
| 7pm | 2am |
| 8pm | 3am |
| 9pm | 4am |
| 10pm | 5am |
| 11pm | 6am |