title: FullCalendar timezone not working
body: <p>I am trying to set the timezone in this example and when time on the calendar is selected, it's clearly still in UTC despite setting the <code>timezone</code> option to 'America/New_York':</p>
  
  <pre><code>$(document).ready(() =&gt; {
      const fc = $('#c');
      const tz = 'America/New_York';
  
      const data = {
          meetings: [
              {
                  title: 'Test data',
                  start: 1513976400000,
                  end: 1513980000000
              }
          ]
      };
      const myEvents = [];
      for (let d = 0; d &lt; data.meetings.length; d += 1) {
          myEvents.push({
              title: 'Booked',
              start: (moment(data.meetings[d].start).tz(tz)),
              end: (moment(data.meetings[d].end).tz(tz)),
          });
      fc.fullCalendar({
          events: myEvents,
          timezone: tz,
          header: {
              left: 'title',
              center: 'month,agendaWeek',
              right: 'today prev,next',
          },
          selectable: true,
          selectHelper: true,
          select(start, end) {
              alert(`Book a meeting for ${start.format('h:mma on dddd M/D')}?`);
          },
          selectOverlap: false,
          editable: false,
          eventOverlap: false,
      });
  
  });
  </code></pre>
  
  <p>Can anyone confirm that this is a bug or user error?</p>