$Request.get.id|get_hiredate|date='Y-m-d',

|default='1987-08-04' If the id is passed in, there is also an existing value in front of default; if Passing an id that does not exist. If the second parameter of the date function is null, it will return 1970-01-01. The subsequent default value will never be executed. It just happens to be 1970-01-01 in the video ###