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