There are total 15 hours or 900 minutes from 10am to 1am. In words, this duration is equal to fifteen hours or nine hundred minutes.
How many hours from
| 9PM to 11PM | 12PM to 4PM | 11AM to 3PM |
| 6PM to 10PM | 12PM to 4AM | 6PM to 8PM |
| 1AM to 11AM | 2AM to 4AM | 5PM to 7PM |
| 5PM to 4PM | 4PM to 10PM | 10PM to 9AM |
| 8PM to 10AM | 2AM to 8AM | 4AM to 2PM |
| 8PM to 11AM | 5PM to 5AM | 8PM to 9AM |
