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