There are total 15 hours or 900 minutes from 1am to 4pm. In words, this duration is equal to fifteen hours or nine hundred minutes.
How many hours from
| 6PM to 4AM | 4PM to 12PM | 10AM to 9PM |
| 7PM to 2AM | 4PM to 4AM | 7AM to 10PM |
| 12PM to 7AM | 7PM to 3AM | 4PM to 6AM |
| 12PM to 8PM | 10AM to 6AM | 12AM to 7AM |
| 3AM to 3PM | 6PM to 12AM | 6PM to 4PM |
| 1AM to 8PM | 9PM to 7AM | 7AM to 6PM |
