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