title: Enable timezone on FullCalendar
body: <p>I'm rebuilding an existing project in which I need to have timezone support. The events get rendered fine by a json-feed. Example data:</p>
  
  <pre><code>[{
      "id":"1",
      "title":"Titel",
      "start":"2016-10-08T12:00:00+02:00",
      "end":"2016-10-08T12:30:00+02:00",
  }]
  </code></pre>
  
  <p>As you see the event has Timezone-Data. (<code>2016-10-08T12:00:00+02:00</code>)</p>
  
  <p>I want to use <code>eventDrop</code> to update an event, an when the user drags and drops an event, the data (eventId, start_time, end_time) is sent to the PHP, which updates the database.</p>
  
  <p>My PHP-script should convert the received start_time &amp; end_time to UTC and write it to the database.</p>
  
  <p>The issue is that fullcalendar doesn't pass the timezone of the event to my PHP.
  I tried passing something like:</p>
  
  <pre><code>event_start: moment(event.start).format("YYYY-MM-DD HH.mm:ssZZ"),
  </code></pre>
  
  <p>The data I get is something like:</p>
  
  <pre><code>event_start: 2016-10-08 12.00:00+0000
  </code></pre>
  
  <p>And I expected it would be something like:</p>
  
  <pre><code>event_start: 2016-10-11 12.00:00+0200
  </code></pre>
  
  <p>With the timezone-information I could easily convert it to UTC.</p>
  
  <p>How can I have access to the timezone on the PHP side?</p>