There are total 1 hours or 60 minutes from 1am to 2am. In words, this duration is equal to one hours or sixty minutes.
How many hours from
| 4AM to 10PM | 4PM to 5PM | 8PM to 10AM |
| 9AM to 4AM | 6PM to 11PM | 10PM to 1AM |
| 10PM to 7AM | 7PM to 1AM | 8PM to 8AM |
| 11AM to 11PM | 5PM to 5AM | 2PM to 7AM |
| 8PM to 7AM | 10PM to 11AM | 6AM to 3PM |
| 10AM to 4PM | 6AM to 3AM | 9PM to 1PM |
