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