There are total 7 hours or 420 minutes from 1am to 8am. In words, this duration is equal to seven hours or four hundred twenty minutes.
How many hours from
| 9AM to 5AM | 8PM to 10AM | 2AM to 7PM |
| 4AM to 12AM | 12PM to 3AM | 5PM to 1AM |
| 6PM to 1PM | 10PM to 2PM | 1PM to 8AM |
| 6PM to 4PM | 1PM to 3AM | 4PM to 2AM |
| 9AM to 1PM | 10AM to 9PM | 11AM to 10PM |
| 6AM to 1AM | 11AM to 5AM | 11PM to 12PM |
