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