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