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