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