There are total 20 hours or 1200 minutes from 1am to 9pm. In words, this duration is equal to twenty hours or one thousand two hundred minutes.
How many hours from
| 6PM to 2AM | 3AM to 8PM | 5PM to 10AM |
| 6PM to 1AM | 7PM to 5AM | 4PM to 5AM |
| 10PM to 7AM | 9AM to 2PM | 9AM to 5AM |
| 12PM to 9AM | 11AM to 10AM | 12AM to 7AM |
| 10AM to 2AM | 8PM to 5PM | 9PM to 2PM |
| 4PM to 6AM | 1AM to 8AM | 2PM to 12AM |
