title: How to format date in libre office
body: <p>I have a column of dates in a format below:</p>
  
  <pre><code>Fri Dec 25 02:45:23 MYT 2015
  Fri Dec 25 17:38:57 MYT 2015
  </code></pre>
  
  <p>How do I change it to a format as below:</p>
  
  <pre><code>2015-12-25
  2015-12-25
  </code></pre>
  
  <p>I have tried to format cells but it is not working. Any idea ?</p>