title: I18n.l displays wrong month (one month later)
body: <p>I have a strage issue with the I18n.l helper. I've got the following date in a updated_at database field: 2013-04-09 08:17:26</p>
  
  <p>i display this date in my view with <code>&lt;%= l product.updated_at %&gt;</code> and get this <strong>the first time</strong> i load the page: <code>Dienstag, 09. April 2013, 10:17 Uhr</code>. When i refresh the page it becomes <code>Dienstag, 09. Mai 2013, 10:17 Uhr</code>. As you can see the date is now one moth later. It sticks to that until i restart the server. Then once again it displays correctly one time.</p>
  
  <p>What could be the issue here?</p>