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