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