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