title: String to DateTime Object
body: <p>I'm new at String functions, so I need a complex substr and trim functions for this string:</p>
  
  <pre><code>Wed, 28 Dec 2011 13:04:30 GMT
  </code></pre>
  
  <p>String comes to me always with this format. I want to convert it to DateTime object. Anybody can help me?</p>