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