There are total 11 hours or 660 minutes from 9am to 8pm. In words, this duration is equal to eleven hours or six hundred sixty minutes.
How many hours from
| 7PM to 1PM | 12AM to 7AM | 1AM to 2PM |
| 1AM to 10AM | 6AM to 1PM | 11AM to 1PM |
| 11PM to 9PM | 9AM to 7AM | 12PM to 1PM |
| 1PM to 7AM | 12AM to 1AM | 1AM to 5AM |
| 3AM to 11PM | 11PM to 7AM | 5PM to 1AM |
| 9AM to 3PM | 12PM to 4PM | 2AM to 12AM |
