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