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
| 7PM to 4PM | 7PM to 1AM | 11AM to 6AM |
| 12AM to 11PM | 1AM to 4AM | 8PM to 2AM |
| 11PM to 11AM | 4PM to 12PM | 8AM to 1PM |
| 11PM to 3AM | 9PM to 10AM | 7PM to 12PM |
| 4PM to 5AM | 2AM to 2PM | 11PM to 3AM |
| 11PM to 1PM | 4PM to 3PM | 6AM to 3PM |
