There are total 13 hours or 780 minutes from 8am to 9pm. In words, this duration is equal to thirteen hours or seven hundred eighty minutes.
How many hours from
| 7PM to 11PM | 5PM to 11AM | 6AM to 11PM |
| 4AM to 9AM | 7PM to 11PM | 9PM to 1AM |
| 2PM to 9PM | 10PM to 7PM | 2AM to 8PM |
| 2PM to 11PM | 5AM to 8AM | 5AM to 4PM |
| 11AM to 4AM | 9PM to 2PM | 6AM to 8AM |
| 8PM to 6PM | 5AM to 8PM | 10PM to 9AM |
