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