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
| 5PM to 7AM | 8AM to 12PM | 11AM to 4AM |
| 1AM to 8AM | 8AM to 10PM | 1AM to 6AM |
| 3AM to 12PM | 1PM to 5AM | 6AM to 4AM |
| 1PM to 8AM | 1AM to 12PM | 7AM to 3PM |
| 6AM to 8AM | 5AM to 12AM | 11PM to 5AM |
| 11PM to 8AM | 2PM to 2AM | 1AM to 6AM |
