There are total 15 hours or 900 minutes from 4am to 7pm. In words, this duration is equal to fifteen hours or nine hundred minutes.
How many hours from
| 8PM to 7AM | 10AM to 12AM | 8PM to 9AM |
| 1AM to 9PM | 7AM to 6PM | 7AM to 12AM |
| 6PM to 7AM | 7AM to 12AM | 9PM to 5PM |
| 5AM to 4PM | 12AM to 8AM | 12PM to 3AM |
| 4PM to 7PM | 9PM to 2PM | 11AM to 6PM |
| 2AM to 9PM | 4AM to 9AM | 7AM to 12AM |
