There are total 19 hours or 1140 minutes from 1am to 8pm. In words, this duration is equal to nineteen hours or one thousand one hundred forty minutes.
How many hours from
| 4PM to 1PM | 11AM to 5PM | 8PM to 1PM |
| 3AM to 4PM | 5AM to 11AM | 9PM to 6AM |
| 2AM to 10PM | 6PM to 4PM | 9AM to 1PM |
| 1PM to 1AM | 3AM to 10AM | 11PM to 2PM |
| 8PM to 8AM | 10AM to 9PM | 9AM to 2PM |
| 7AM to 6AM | 8PM to 2AM | 9AM to 8AM |
