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