There are total 20 hours or 1200 minutes from 1pm to 9am. In words, this duration is equal to twenty hours or one thousand two hundred minutes.
How many hours from
| 10PM to 3PM | 5PM to 8PM | 8AM to 3PM |
| 11AM to 8AM | 3AM to 4PM | 4PM to 12AM |
| 5AM to 11PM | 6PM to 3AM | 5AM to 3PM |
| 8PM to 3PM | 12PM to 6AM | 3AM to 12PM |
| 7PM to 10AM | 11PM to 1AM | 1PM to 2AM |
| 5AM to 4PM | 8AM to 4PM | 2AM to 5AM |
