There are total 10 hours or 600 minutes from 9pm to 7am. In words, this duration is equal to ten hours or six hundred minutes.
How many hours from
| 3AM to 1AM | 9PM to 12PM | 12AM to 3AM |
| 6PM to 8PM | 11PM to 4AM | 1AM to 2PM |
| 9PM to 7PM | 1PM to 9PM | 1AM to 4PM |
| 1AM to 3AM | 10PM to 8AM | 12AM to 3AM |
| 11PM to 5AM | 8AM to 4AM | 11AM to 1PM |
| 1PM to 11PM | 8AM to 7AM | 11AM to 1PM |
