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