There are total 20 hours or 1200 minutes from 1am to 9pm. In words, this duration is equal to twenty hours or one thousand two hundred minutes.
How many hours from
| 11PM to 4PM | 8AM to 9PM | 6AM to 7AM |
| 7AM to 4PM | 6PM to 1PM | 12AM to 5PM |
| 2PM to 9PM | 10PM to 11AM | 1AM to 10AM |
| 11PM to 6PM | 10AM to 9PM | 8PM to 10AM |
| 10PM to 9PM | 12PM to 5PM | 3AM to 6AM |
| 5AM to 6AM | 10AM to 8PM | 10AM to 2PM |
