The time difference between Ulaanbaatar and Chicago is 13 hours. When it is 12:00 noon in Ulaanbaatar, it is 23:00 in Chicago. Ulaanbaatar uses the Asia/Ulaanbaatar time zone (UTC+8), while Chicago uses America/Chicago (UTC-5).
| Detail | Ulaanbaatar | Chicago |
|---|---|---|
| Time Zone ID | Asia/Ulaanbaatar | America/Chicago |
| UTC Offset | UTC+8 | UTC-5 |
| Abbreviation | +08 | CDT |
| DST Active | No | Yes — currently observing |
| Country | Mongolia | United States |
| Region | Asia | North America |
With a 13 hours gap, there is no standard business-hours overlap between Ulaanbaatar and Chicago. One party will need to adjust their schedule. Early mornings in Ulaanbaatar or late evenings in Chicago tend to be the most practical compromise.
Use this table to quickly convert any hour from Ulaanbaatar time to Chicago time. Rows highlighted in green indicate overlapping business hours in both cities.
| Ulaanbaatar | Chicago | |
|---|---|---|
| 00:00 | 11:00 (-1 day) | Night |
| 01:00 | 12:00 (-1 day) | Night |
| 02:00 | 13:00 (-1 day) | Night |
| 03:00 | 14:00 (-1 day) | Night |
| 04:00 | 15:00 (-1 day) | Night |
| 05:00 | 16:00 (-1 day) | Night |
| 06:00 | 17:00 (-1 day) | |
| 07:00 | 18:00 (-1 day) | |
| 08:00 | 19:00 (-1 day) | |
| 09:00 | 20:00 (-1 day) | |
| 10:00 | 21:00 (-1 day) | |
| 11:00 | 22:00 (-1 day) | |
| 12:00 | 23:00 (-1 day) | |
| 13:00 | 00:00 | |
| 14:00 | 01:00 | |
| 15:00 | 02:00 | |
| 16:00 | 03:00 | |
| 17:00 | 04:00 | |
| 18:00 | 05:00 | |
| 19:00 | 06:00 | |
| 20:00 | 07:00 | |
| 21:00 | 08:00 | |
| 22:00 | 09:00 | Night |
| 23:00 | 10:00 | Night |
Chicago is currently observing daylight saving time, while Ulaanbaatar is on standard time. When Chicago switches back to standard time, the difference between these two cities will shift by 1 hour.
The time difference is 13 hours. Chicago is 13 hours behind Ulaanbaatar.
Yes. One of these cities observes DST while the other does not, so the difference shifts by 1 hour when DST begins or ends.
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 13 hours from Ulaanbaatar 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.