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