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
| 7PM to 12PM | 11PM to 7AM | 6AM to 2AM |
| 12PM to 6AM | 1PM to 4AM | 6PM to 7AM |
| 7PM to 12PM | 2PM to 2AM | 8AM to 12AM |
| 6PM to 4AM | 8AM to 5AM | 3PM to 4PM |
| 5AM to 2AM | 10PM to 5PM | 7PM to 8AM |
| 7PM to 1AM | 11PM to 3PM | 6AM to 7PM |
