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