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