The time difference between Colombo and Chicago is 11 hours and 30 minutes. When it is 12:00 noon in Colombo, it is 00:30 in Chicago. Colombo uses the Asia/Colombo time zone (UTC+5:30), while Chicago uses America/Chicago (UTC-6).
With a 11 hours and 30 minutes gap, there is no standard business-hours overlap between Colombo and Chicago. One party will need to adjust their schedule. Early mornings in Colombo or late evenings in Chicago tend to be the most practical compromise.
Use this table to quickly convert any hour from Colombo time to Chicago time. Rows highlighted in green indicate overlapping business hours in both cities.
| Colombo | Chicago | |
|---|---|---|
| 00:00 | 12:30 (-1 day) | Night |
| 01:00 | 13:30 (-1 day) | Night |
| 02:00 | 14:30 (-1 day) | Night |
| 03:00 | 15:30 (-1 day) | Night |
| 04:00 | 16:30 (-1 day) | Night |
| 05:00 | 17:30 (-1 day) | Night |
| 06:00 | 18:30 (-1 day) | |
| 07:00 | 19:30 (-1 day) | |
| 08:00 | 20:30 (-1 day) | |
| 09:00 | 21:30 (-1 day) | |
| 10:00 | 22:30 (-1 day) | |
| 11:00 | 23:30 (-1 day) | |
| 12:00 | 00:30 | |
| 13:00 | 01:30 | |
| 14:00 | 02:30 | |
| 15:00 | 03:30 | |
| 16:00 | 04:30 | |
| 17:00 | 05:30 | |
| 18:00 | 06:30 | |
| 19:00 | 07:30 | |
| 20:00 | 08:30 | |
| 21:00 | 09:30 | |
| 22:00 | 10:30 | Night |
| 23:00 | 11:30 | Night |
Neither Colombo nor Chicago is currently observing daylight saving time. If either city observes DST, the time difference will change by 1 hour when DST begins or ends. Always double-check before scheduling across these time zones during March–April and October–November.
The time difference is 11 hours and 30 minutes. Chicago is 11 hours and 30 minutes behind Colombo.
It can. If either Colombo or Chicago observes daylight saving time, the gap will shift by 1 hour during the transition periods (typically March–April and October–November).
There is no ideal window during standard business hours. Consider scheduling at the edges — early morning for the city that is ahead and late afternoon for the city that is behind.
Subtract 11 hours and 30 minutes from Colombo time to get Chicago time. Use the hour-by-hour table above for a quick reference.
For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.