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