There are total 13 hours or 780 minutes from 8pm to 9am. In words, this duration is equal to thirteen hours or seven hundred eighty minutes.
How many hours from
| 3PM to 1PM | 6AM to 2AM | 4AM to 6PM |
| 1AM to 7AM | 9AM to 8PM | 2PM to 11PM |
| 8PM to 7PM | 4AM to 3AM | 7AM to 9AM |
| 4AM to 6PM | 4PM to 6AM | 3PM to 6AM |
| 11AM to 2AM | 8PM to 12AM | 7AM to 3PM |
| 2PM to 4AM | 11AM to 6PM | 11PM to 9PM |
