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