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