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