<div class="container pt-5 pb-5">
  <h1 class="text-light">Until New Year 2020</h1>
  <div class="flipper" data-datetime="2020-01-01 00:00:00" data-template="ddd|HH|ii|ss" data-labels="Days|Hours|Minutes|Seconds" id="myFlipper"></div>
  <!-- Button trigger modal -->
  <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
    Launch demo modal
  </button>
</div>

<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <div class="flipper" data-datetime="2020-01-01 00:00:00" data-template="ddd|HH|ii|ss" data-labels="Days|Hours|Minutes|Seconds" id="modalFlipper"></div>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
      </div>
    </div>
  </div>
</div>