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