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