There are total 3 hours or 180 minutes from 9pm to 12am. In words, this duration is equal to three hours or one hundred eighty minutes.
How many hours from
| 10AM to 9PM | 4PM to 3AM | 10AM to 7AM |
| 8PM to 6AM | 2AM to 7PM | 2PM to 9AM |
| 1AM to 8AM | 10AM to 3AM | 10AM to 7PM |
| 3PM to 9AM | 8AM to 1PM | 9AM to 10PM |
| 9PM to 12PM | 2PM to 11PM | 3PM to 10AM |
| 3AM to 6AM | 8AM to 8PM | 12PM to 11AM |
