What is the reason the datepicker doesn't allow you bind on the custom UI events

What is the reason the datepicker doesn't allow you bind on the custom UI events

What is the reason that the datapicker doesn't allow you to bind to its events? 

    
    
     
  1. $('.selector').datepicker().bind('datepickeronselect',function(){
    2. 
     
  2.     console.log('hello');
    3. 
     
  3. });
    4. 
    

    

     All of the other widgets allow you to do so but the datepicker seems to be left out.