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