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