There are total 1 hours or 60 minutes from 8am to 9am. In words, this duration is equal to one hours or sixty minutes.
How many hours from
| 9PM to 5AM | 11AM to 2PM | 4PM to 1PM |
| 3PM to 10PM | 10PM to 6AM | 1AM to 6AM |
| 12AM to 11PM | 10AM to 8AM | 3PM to 12PM |
| 12AM to 1AM | 2AM to 8PM | 7PM to 9AM |
| 9PM to 7PM | 6PM to 5PM | 7AM to 11PM |
| 4PM to 5AM | 3PM to 4AM | 5AM to 9PM |
