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