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