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