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