<!-- Button to trigger modal -->
<a href="#myModal" role="button" class="btn" data-toggle="modal">Launch demo modal</a>
 
<!-- Modal -->
<div id="myModal" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
  <div class="modal-header">
    <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
    <h3 id="myModalLabel">Modal header</h3>
  </div>
  <div class="modal-body">
    <div id="datetimepicker1" class="input-append date">
      <input data-format="dd/MM/yyyy hh:mm:ss" type="text"></input>
      <span class="add-on"><i data-time-icon="icon-time" data-date-icon="icon-calendar"></i></span>
    </div>
  </div>
  <div class="modal-footer">
    <button class="btn" data-dismiss="modal" aria-hidden="true">Close</button>
  </div>
</div>

$(function() {
  $('#datetimepicker1').datetimepicker({
    language: 'pt-BR'
  });
});