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
| 6AM to 10PM | 5PM to 10AM | 1AM to 5AM |
| 5AM to 9AM | 3PM to 6AM | 10PM to 10AM |
| 8AM to 9PM | 3PM to 2AM | 4AM to 8AM |
| 5PM to 5AM | 9PM to 9AM | 3AM to 4AM |
| 11PM to 4PM | 2PM to 6PM | 12PM to 11AM |
| 3AM to 8AM | 2AM to 10AM | 1AM to 10AM |
