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