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