There are total 1 hours or 60 minutes from 8pm to 9pm. In words, this duration is equal to one hours or sixty minutes.
How many hours from
| 5AM to 10AM | 9PM to 7PM | 6AM to 4PM |
| 2AM to 6PM | 9AM to 12AM | 4PM to 9PM |
| 8PM to 7PM | 1PM to 1AM | 11AM to 11PM |
| 6PM to 3PM | 11AM to 3AM | 2AM to 10PM |
| 1PM to 7AM | 8PM to 11PM | 4AM to 5AM |
| 10PM to 9AM | 8AM to 9PM | 10PM to 8PM |
