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