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