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