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