title: Use 4-digit years for localised dates in a Twig template
body: <p>I use the Twig Intl Extension in my Symfony 2.4 project to localize dates:</p>
  
  <p><code>
  {{ post.published_at|localizeddate('short', 'none', locale) }}
  </code></p>
  
  <p>This works well, but does not display the full year in the <code>yyyy</code> format and uses the <code>yy</code> format instead.</p>
  
  <p>This way, December 31, 2013 would be displayed like 31/12/2013 or 12/31/2013 depending on the locale, instead of 31/12/13 or 31/12/13.</p>
  
  <p>Is there a way to use a 4 digit year with the localised date?</p>