title: Unable to set timezone
body: <p>I am unable to set timezone for my DateTime objects.<br>
  Here is my code : </p>
  
  <pre><code>$dt = DateTime::createFromFormat('U',time(),new DateTimeZone('Asia/Kolkata'));
  print_r($dt-&gt;getTimeZone());
  </code></pre>
  
  <p>Here is the output :   </p>
  
  <pre><code>DateTimeZone Object
  (
  )
  </code></pre>
  
  <p>I also tried putting these lines at the top (one at a time) - without any success:   </p>
  
  <pre><code>date_default_timezone_set('Asia/Calcutta');
  ini_set('date.timezone', 'Asia/Calcutta');
  date_default_timezone_set('Asia/Kolkata');
  ini_set('date.timezone', 'Asia/Kolkata');
  </code></pre>