There are total 9 hours or 540 minutes from 12pm to 9pm. In words, this duration is equal to nine hours or five hundred forty minutes.
How many hours from
| 5AM to 7PM | 3PM to 6AM | 2AM to 11PM |
| 8AM to 7PM | 10PM to 6AM | 3PM to 2AM |
| 4AM to 4PM | 6PM to 10PM | 7AM to 11AM |
| 2AM to 5AM | 12AM to 4PM | 5PM to 9AM |
| 4PM to 11AM | 7PM to 3AM | 4PM to 11PM |
| 11PM to 5PM | 10AM to 12AM | 2PM to 6AM |
