There are total 3 hours or 180 minutes from 1am to 4am. In words, this duration is equal to three hours or one hundred eighty minutes.
How many hours from
| 8PM to 5AM | 4PM to 2AM | 4PM to 2PM |
| 5PM to 8AM | 9AM to 2PM | 5PM to 11PM |
| 10AM to 4PM | 8PM to 4AM | 7PM to 10AM |
| 2AM to 12AM | 9AM to 7PM | 3AM to 5PM |
| 12AM to 2PM | 2AM to 12AM | 4PM to 9PM |
| 12AM to 4PM | 5PM to 2AM | 12PM to 9AM |
