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