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