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