Hi Scott,
The format you're using for the registered function is "MM/DD/YYY:hh:mm:ss" but you then compare that to "13:52 on 10-12-2020" which is "hh:mm on mm-dd-yyy" format, so this comparison will never be true. To make it work, change the first parameter in the registered function to "hh:mm on mm-dd-yyyy".