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