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