There are total 15 hours or 900 minutes from 1pm to 4am. In words, this duration is equal to fifteen hours or nine hundred minutes.
How many hours from
| 1AM to 6PM | 5PM to 6AM | 3PM to 6AM |
| 2PM to 9AM | 1PM to 7PM | 3PM to 10AM |
| 9AM to 10PM | 6AM to 11AM | 4PM to 10PM |
| 4PM to 9AM | 3PM to 4PM | 3PM to 7PM |
| 3AM to 5PM | 5PM to 5AM | 2AM to 10PM |
| 5AM to 6AM | 7PM to 3AM | 3PM to 1PM |
