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