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