There are total 18 hours or 1080 minutes from 1pm to 7am. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 8PM to 8AM | 11PM to 3AM | 10AM to 7PM |
| 8PM to 11PM | 4AM to 6AM | 4PM to 10AM |
| 11PM to 8AM | 4AM to 11AM | 9PM to 2AM |
| 12AM to 2AM | 6PM to 9AM | 11PM to 4PM |
| 5AM to 1PM | 9PM to 12PM | 3AM to 4PM |
| 6PM to 8PM | 4PM to 10PM | 10AM to 4AM |
