There are total 20 hours or 1200 minutes from 8am to 4am. In words, this duration is equal to twenty hours or one thousand two hundred minutes.
How many hours from
| 8PM to 7PM | 11AM to 10PM | 1PM to 7AM |
| 1AM to 1PM | 8PM to 1PM | 3AM to 1AM |
| 6AM to 4AM | 9AM to 10AM | 2AM to 6AM |
| 5PM to 12PM | 7PM to 1AM | 12AM to 7PM |
| 3PM to 3AM | 12PM to 11PM | 4PM to 7PM |
| 8AM to 9AM | 8AM to 5PM | 3PM to 3AM |
