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