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