There are total 21 hours or 1260 minutes from 12am to 9pm. In words, this duration is equal to twenty-one hours or one thousand two hundred sixty minutes.
How many hours from
| 9PM to 1AM | 10PM to 3AM | 11PM to 10PM |
| 8PM to 11PM | 2AM to 12PM | 12AM to 12PM |
| 9AM to 8AM | 11PM to 3AM | 4PM to 12AM |
| 9PM to 10AM | 10PM to 4PM | 10PM to 6AM |
| 10PM to 9AM | 8PM to 5PM | 6AM to 3PM |
| 3AM to 1PM | 6PM to 11AM | 3PM to 8AM |
