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
| 5AM to 8PM | 6PM to 4PM | 12AM to 8PM |
| 7AM to 4AM | 5AM to 9AM | 3PM to 5AM |
| 4AM to 7AM | 9PM to 8AM | 9AM to 1AM |
| 4PM to 11PM | 6PM to 4PM | 2AM to 12PM |
| 1AM to 6AM | 3AM to 5PM | 2PM to 6AM |
| 8PM to 11PM | 7PM to 8AM | 9PM to 4PM |
