There are total 15 hours or 900 minutes from 6am to 9pm. In words, this duration is equal to fifteen hours or nine hundred minutes.
How many hours from
| 4PM to 8AM | 1PM to 11AM | 8PM to 11PM |
| 10AM to 3AM | 2AM to 1AM | 8AM to 7AM |
| 6PM to 1AM | 4PM to 8PM | 12AM to 4PM |
| 3PM to 9AM | 3PM to 10AM | 2AM to 11PM |
| 11PM to 3AM | 3AM to 1PM | 7PM to 8AM |
| 6AM to 8AM | 3AM to 1PM | 6PM to 2AM |
