inline datepicker beforeShow not occurring

Here is the JSFiddle that I created to show this issue:

From what I understand, the beforeShow 'event' calls the function assigned to it before actually displaying the calendar part of the datepicker. So in that function I put an alert( 'hi' ); statement, but it never shows.

The demo shows this in an always open inline datepicker calendar, but I've tried this in a 'regular' datepicker and text box field, too, and both ways fail to show the alert.