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