There are total 4 hours or 240 minutes from 9pm to 1am. In words, this duration is equal to four hours or two hundred forty minutes.
How many hours from
| 8PM to 2PM | 4AM to 11PM | 2AM to 1AM |
| 1PM to 7AM | 3AM to 4PM | 9AM to 3AM |
| 6PM to 10AM | 6AM to 1PM | 10AM to 3PM |
| 2AM to 6AM | 1AM to 1PM | 12PM to 3PM |
| 10AM to 10PM | 8PM to 3PM | 1AM to 10PM |
| 7PM to 10AM | 8AM to 6AM | 9AM to 6PM |
