There are total 21 hours or 1260 minutes from 4pm to 1pm. In words, this duration is equal to twenty-one hours or one thousand two hundred sixty minutes.
How many hours from
| 12AM to 5AM | 1PM to 3AM | 11PM to 2PM |
| 1AM to 8PM | 5AM to 8AM | 10PM to 2PM |
| 7AM to 5PM | 4AM to 10AM | 2AM to 4AM |
| 4PM to 3AM | 6PM to 9AM | 12AM to 5PM |
| 4AM to 4PM | 4PM to 1AM | 1AM to 10AM |
| 9AM to 3AM | 10PM to 4PM | 4AM to 2PM |
