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