<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>

<script src="../../js/jquery.timepicker.min.js" type="text/javascript" ></script>

<input type="text" class="datePicker" name="section1_date" placeholder="">

<script>

    $( function() {

        $(".datePicker").datepicker();

        $(".datepicker").datepicker( "option", "dateFormat", "yy-mm-dd" );

        $(".timePicker").timepicker();

        $(".timePicker").timepicker({ 'timeFormat': 'H:i' });

    } );

</script>