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