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