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
| 10AM to 1AM | 11PM to 5AM | 12PM to 10AM |
| 2PM to 4PM | 5PM to 10PM | 7PM to 6PM |
| 8AM to 12AM | 6AM to 11PM | 10PM to 11AM |
| 12PM to 3AM | 8AM to 10AM | 1PM to 9AM |
| 7PM to 10PM | 5PM to 2PM | 11PM to 7AM |
| 10PM to 4AM | 4AM to 4PM | 8PM to 7PM |
