UTC dateTimePicker

<link href="https://www.jqueryscript.net/demo/Datetime-Picker-jQuery-Moment/css/datetimepicker.css" rel="stylesheet" type="text/css"/>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment-with-locales.min.js" integrity="sha512-LGXaggshOkD/at6PFNcp2V2unf9LzFq6LE+sChH7ceMTDP0g2kn6Vxwgg7wkPP7AAtX+lmPqPdxB47A0Nz0cMQ==" crossorigin="anonymous"></script>
<script type="text/javascript" src="https://www.jqueryscript.net/demo/Datetime-Picker-jQuery-Moment/js/datetimepicker.js"></script>
<div style="width: 250px;">
    <div id="picker"></div>
    <input type="hidden" id="result" value="" />
    <input type="hidden" id="clone" name="schedule" value="" />
</div>

$(document).ready( function () {
    $('#picker').dateTimePicker();
})

String.prototype.toDate = function(format)
{
  var normalized      = this.replace(/[^a-zA-Z0-9]/g, '-');
  var normalizedFormat= format.toLowerCase().replace(/[^a-zA-Z0-9]/g, '-');
  var formatItems     = normalizedFormat.split('-');
  var dateItems       = normalized.split('-');

  var monthIndex  = formatItems.indexOf("mm");
  var dayIndex    = formatItems.indexOf("dd");
  var yearIndex   = formatItems.indexOf("yyyy");
  var hourIndex     = formatItems.indexOf("hh");
  var minutesIndex  = formatItems.indexOf("ii");
  var secondsIndex  = formatItems.indexOf("ss");

  var today = new Date();

  var year  = yearIndex>-1  ? dateItems[yearIndex]    : today.getFullYear();
  var month = monthIndex>-1 ? dateItems[monthIndex]-1 : today.getMonth()-1;
  var day   = dayIndex>-1   ? dateItems[dayIndex]     : today.getDate();

  var hour    = hourIndex>-1      ? dateItems[hourIndex]    : today.getHours();
  var minute  = minutesIndex>-1   ? dateItems[minutesIndex] : today.getMinutes();
  var second  = secondsIndex>-1   ? dateItems[secondsIndex] : today.getSeconds();

  return new Date(year,month,day,hour,minute,second);
};

function generateDateTime(date) {
  return date.toISOString().replace("T"," ").substring(0, 19);
}

function cloneUTC() {
    var localTime = $("#result").val();
    if (localTime != "") {
      var time = localTime.toDate("yyyy-mm-dd hh:ii");
      var utcString = generateDateTime(time);
      
      $("#clone").val(utcString);
    }
}