There are total 7 hours or 420 minutes from 9pm to 4am. In words, this duration is equal to seven hours or four hundred twenty minutes.
How many hours from
| 8PM to 8AM | 9PM to 11PM | 3PM to 8AM |
| 6AM to 8PM | 5AM to 4AM | 8AM to 10AM |
| 8AM to 3PM | 9AM to 10PM | 5PM to 12AM |
| 2AM to 7PM | 5PM to 3AM | 3PM to 11AM |
| 8PM to 1AM | 3AM to 9AM | 10PM to 1AM |
| 12AM to 9PM | 3PM to 12AM | 11PM to 11AM |
