title: jQuery FullCalendar > How to add a button (or link) to only days having events
body: <p>I am using FullCalendar3.5.1.</p>
  
  <p>I want to add one custom link to event day after all event for the day has been rendered.</p>
  
  <p>If I use <code>eventAfterRender</code>, it display link after each event. So if there are 3 events it display 3 links while I need only one.</p>
  
  <pre class="lang-js prettyprint-override"><code>eventAfterRender: function(event, element, view) { 
      console.log(event);
      var new_description ='&lt;br/&gt;&lt;a href="javascript:dayDetails('+ '&amp;#39;'
      +'template.html' + '&amp;#39;'+',500,400,' + '&amp;#39;'+event.start +'&amp;#39;' 
      +',' + '&amp;#39;'+ 'dayView' + '&amp;#39;' +')"&gt;'
      + '&lt;strong&gt;Details&lt;/strong&gt;'  + '&lt;/a&gt;' + '&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;'
      element.append(new_description); 
  }
  </code></pre>