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