title: Change time in timepicker when date is changed
body: <p>I have the following jQuery date and time pickers:</p>
  
  <pre><code>$('.timepicker').timepicker({
      'minTime': '05:15',
      'maxTime': '21:15',
      'timeFormat': 'H:i',
      'step': 15,
      'forceRoundTime': true,
  });
  
  $('.datepicker').datetimepicker({
      format: 'YYYY-MM-DD',
  });
  </code></pre>
  
  <p>I want to change the time whenever the date is changed. I have tried the following different methods:</p>
  
  <pre><code>$('.datepicker').change(function() {
      $('.timepicker').text('09:15')
  })
  </code></pre>
  
  
  
  <pre><code>$('.datepicker').change(function() {
      $('.timepicker').setTime('09:15')
  })
  </code></pre>
  
  
  
  <pre><code>$('.timepicker').val('09:15')
  </code></pre>
  
  <p>And it still doesn't work.</p>