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