There are total 21 hours or 1260 minutes from 12pm to 9am. In words, this duration is equal to twenty-one hours or one thousand two hundred sixty minutes.
How many hours from
| 4AM to 3AM | 3PM to 7AM | 11AM to 7AM |
| 11PM to 7PM | 7PM to 2AM | 5PM to 4AM |
| 1PM to 8PM | 8PM to 11PM | 4AM to 9AM |
| 11AM to 9PM | 11PM to 4AM | 5AM to 1PM |
| 8AM to 10PM | 5AM to 9PM | 8AM to 7PM |
| 1AM to 9AM | 4PM to 11PM | 6AM to 7PM |
