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