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