There are total 13 hours or 780 minutes from 8pm to 9am. In words, this duration is equal to thirteen hours or seven hundred eighty minutes.
How many hours from
| 8AM to 4PM | 8AM to 10PM | 10AM to 7PM |
| 12PM to 11PM | 2AM to 12AM | 7PM to 7AM |
| 8PM to 1AM | 10PM to 1PM | 4AM to 9PM |
| 12AM to 1PM | 11PM to 7AM | 7AM to 6AM |
| 9PM to 12AM | 12AM to 4PM | 4AM to 8PM |
| 2PM to 8AM | 11AM to 6PM | 2AM to 7PM |
