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