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