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