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