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