title: How to update start Time(!) in fullcalendar.js
body: <p>Is there a way to change the start time of an Event, wich I draged into the calendar. </p>
  
  <p>The Event comes from an external Source like this:</p>
  
  <pre><code>//initialize the external events
  
      $('#external-events .fc-event').each(function() {
  
          /* // store data so the calendar knows to render an event upon drop
          $(this).data('event', {
              title: $.trim($(this).text()), // use the element's text as the event title
              stick: true // maintain when user navigates (see docs on the renderEvent method)
          });
          */
          var eventObject = {
              title: $.trim($(this).text()), // use the element's text as the event title
              id: $(this).data('id')
          };          
  
          // store the Event Object in the DOM element so we can get to it later
          $(this).data('eventObject', eventObject);
  
          // make the event draggable using jQuery UI
          $(this).draggable({
              zIndex: 999,
              revert: true,      // will cause the event to go back to its
              revertDuration: 0  //  original position after the drag
          });
  
      });
  </code></pre>
  
  <p>I want to change/update the start Time and Title - if necessary - of the Event in a modal Dialog. It seems to work fine, but everytime I add another Event by dragging and want to change it, it changes all other dragged Events, too.</p>
  
  <pre><code>eventClick: function(calEvent, jsEvent, view) {
  
  
             //Sending data to modal:         
  
              $('#modal').modal('show');
              $("#input_title").val(calEvent.title);
              var my_time = moment(calEvent.start).format('LT');
              $("#input_time").val(my_time);
              var my_date = moment(calEvent.start).format("YYYY-MM-DD");
              $("#input_date").val(my_date);
  
              // waiting for button 'save' click:
              $('.btn-primary').on('click', function (myEvent) {
  
                      calEvent.title = $("#input_title").val();
                      var my_input_time = $("#input_time").val();
                      var momentTimeObj = moment(my_input_time, 'HH:mm:ss');
                      var momentTimeString = momentTimeObj.format('HH:mm:ss');
  
                      var my_input_date = $("#input_date").val();
                      var momentDateObj = moment(my_input_date, 'YYYY-MM-DD');
                      var momentDateString = momentDateObj.format('YYYY-MM-DD');
  
                      calEvent.start = moment(momentDateString + ' ' + momentTimeString, "YYYY-MM-DD HH:mm");
  
  
                      $('#calendar').fullCalendar('updateEvent', calEvent);
                      $('#calendar').fullCalendar('unselect');
                      $('#modal').modal('hide');
                });       
  
              }
  </code></pre>
  
  <p>What I am doing wrong?</p>