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