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