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