| Calumet City Time | MDT | |
|---|---|---|
| 03:00 AM Thursday Calumet City Time (CDT) | ↔ | 02:00 AM Thursday MDT |
| 04:00 AM Thursday Calumet City Time (CDT) | ↔ | 03:00 AM Thursday MDT |
| 05:00 AM Thursday Calumet City Time (CDT) | ↔ | 04:00 AM Thursday MDT |
| 06:00 AM Thursday Calumet City Time (CDT) | ↔ | 05:00 AM Thursday MDT |
| 07:00 AM Thursday Calumet City Time (CDT) | ↔ | 06:00 AM Thursday MDT |