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