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