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