smalot-bootstrap-datetimepicker (jquery)

https://github.com/smalot/bootstrap-datetimepicker 
  <input class="form-control" id="simpliest" type="text" style="max-width:210px;">

  <script>
    (function () {
      // use moment to set initial datetime to now
      var d = moment().format('MM/DD/YYYY hh:mm A');
      $('#simpliest').val(d);

      $("#simpliest").datetimepicker({
        format: "mm/dd/yyyy HH:ii P",
        startDate: d, //set min datetime that is allowed
        showMeridian: true,
        autoclose: true,
        todayBtn: true
      });
    })();
  </script>

dependencies