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