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