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