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