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