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
| 3PM to 12PM | 6PM to 9AM | 7PM to 5PM |
| 6AM to 3AM | 10PM to 5PM | 5PM to 11AM |
| 5PM to 8PM | 1AM to 9AM | 6AM to 5AM |
| 1AM to 11AM | 12PM to 8PM | 10PM to 12PM |
| 8PM to 6PM | 11PM to 1AM | 12AM to 9AM |
| 9AM to 2AM | 10PM to 9AM | 10PM to 6AM |
