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