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