There are total 12 hours or 720 minutes from 9pm to 9am. In words, this duration is equal to twelve hours or seven hundred twenty minutes.
How many hours from
| 10PM to 7AM | 2AM to 1AM | 7PM to 1PM |
| 4PM to 12AM | 3AM to 12AM | 12AM to 6PM |
| 8PM to 7AM | 5PM to 6AM | 2PM to 9PM |
| 2PM to 6PM | 5AM to 1AM | 9AM to 1PM |
| 1PM to 11PM | 10PM to 3PM | 3AM to 12PM |
| 7PM to 6AM | 12AM to 2AM | 11PM to 5PM |
