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