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