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