How to change date format (MM/DD/YY) to (YYYY-MM-DD) in date picker

Use the dateFormat option

 $(function(){
        $("#to").datepicker({ dateFormat: 'yy-mm-dd' });
        $("#from").datepicker({ dateFormat: 'yy-mm-dd' }).bind("change",function(){
            var minValue = $(this).val();
            minValue = $.datepicker.parseDate("yy-mm-dd", minValue);
            minValue.setDate(minValue.getDate()+1);
            $("#to").datepicker( "option", "minDate", minValue );
        })
    });

Demo at http://jsfiddle.net/gaby/WArtA/

I had the same issue and I have tried many answers but nothing worked.

I tried the following and it worked successfully :

<input type=text  data-date-format='yy-mm-dd'  > 

Try the following:

$('#to').datepicker({
      dateFormat: 'yy-mm-dd'
});

You'd think it would be yyyy-mm-dd but oh well :P