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