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
| 5AM to 9PM | 8AM to 11AM | 11AM to 9PM |
| 5PM to 4PM | 6PM to 10PM | 2PM to 10AM |
| 5AM to 12AM | 3AM to 10PM | 1PM to 11PM |
| 10AM to 8PM | 4PM to 4AM | 7AM to 9AM |
| 11AM to 9AM | 6PM to 1AM | 5AM to 7AM |
| 2PM to 11AM | 3AM to 5PM | 7AM to 3PM |
