JAVASCRIPT

.datepicker make modal exit

$('.datepicker').datepicker().on('changeDate', function(ev) {
	// YOUR CODE
}).on('hide', function(event) {
	event.preventDefault();
	event.stopPropagation();
});

.datepicker make modal exit

<style type="text/css">
    .ui-datepicker
    {
        z-index: 1001 !important; /* must be > than popup editor (1000) */
    }
</style>

.datepicker make modal exit

$('#fecha_nac').datepicker({
      format: 'dd-mm-yyyy',
      autoclose: true,
      language: 'es'
  }).on('hide', function(e) {
    e.stopPropagation();
  });