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