There are total 12 hours or 720 minutes from 9am to 9pm. In words, this duration is equal to twelve hours or seven hundred twenty minutes.
How many hours from
| 8PM to 8AM | 6PM to 2AM | 11PM to 1AM |
| 2AM to 7PM | 9PM to 11AM | 6PM to 6AM |
| 10AM to 5AM | 10PM to 1PM | 11AM to 9PM |
| 8PM to 5PM | 10PM to 5AM | 5AM to 10AM |
| 7AM to 3AM | 9AM to 11PM | 10AM to 12PM |
| 2PM to 12PM | 11AM to 12PM | 7AM to 7PM |
