title: php 5.3 Fatal error Class DateTimeZone not found
body: <p>I tried, to run the following code, on PHP v5.3.13, but still getting the class not found error:</p>
  
  <pre><code>$tZone = new DateTimeZone("Europe/Amsterdam");
  </code></pre>
  
  <p>How can I use DateTimeZone on 5.3.13?</p>