Time in COST and CHAST
The time difference between Colombia Summer Time (COST) and Chatham Standard Time (CHAST) is 16 hours 45 minutes. Chatham Standard Time is 16 hours 45 minutes ahead of Colombia Summer Time.
This means 9am COST is 1:45am CHAST (next day) and 5pm COST is 9:45am CHAST (next day).
Colombia Summer Time
- The current local time in COST is 5:35 pm (July 18, 2026)
- COST time zone offset is UTC-04:00
Chatham Standard Time
- The current local time in CHAST is 2:20 am (July 19, 2026)
- CHAST time zone offset is UTC+12:45
How to convert Colombia Summer Time to Chatham Standard Time?
Add 16 hours 45 minutes to Colombia Summer Time to get Chatham Standard Time.
Time in COST
00:00
Time in CHAST
00:00
Use the slider above to convert Colombia Summer Time to Chatham Standard 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 | CHAST |
|---|---|
| 12am | 4:45pm |
| 1am | 5:45pm |
| 2am | 6:45pm |
| 3am | 7:45pm |
| 4am | 8:45pm |
| 5am | 9:45pm |
| 6am | 10:45pm |
| 7am | 11:45pm |
| 8am | 0:45am |
| 9am | 1:45am |
| 10am | 2:45am |
| 11am | 3:45am |
| 12pm | 4:45am |
| 1pm | 5:45am |
| 2pm | 6:45am |
| 3pm | 7:45am |
| 4pm | 8:45am |
| 5pm | 9:45am |
| 6pm | 10:45am |
| 7pm | 11:45am |
| 8pm | 12:45pm |
| 9pm | 1:45pm |
| 10pm | 2:45pm |
| 11pm | 3:45pm |