title: DateTime::format and strftime
body: <p>I have <code>$date = $run['at'];</code> which gives me <em>2013-06-03T16:52:24Z</em> (from a JSON input).
  To transform it to get for example "<em>d M Y, H:i</em>" I use</p>
  
  <pre><code>$date = new DateTime($run['at']);
  echo $date-&gt;format('d M Y, H:i');
  </code></pre>
  
  <p>Problem is I need the date in italian. And the only function that supports <code>set_locale</code> is <code>strftime</code>.
  How can I "wrap" <code>DateTime::format</code> with <code>strftime</code> (or replace, dunno)?</p>