title: Month name to month number - 03 for Feb?
body: <p>I am trying to convert string month name to month number,</p>
  
  <p>but why do I get <strong>'03'</strong> in the result for <strong>'Feb'</strong> in,</p>
  
  <pre><code>strtolower(date('m', strtotime('Feb')));
  </code></pre>
  
  <p>I tested with other month names and they seem to be fine,</p>
  
  <pre><code>strtolower(date('m', strtotime('Jan'))); // 01
  strtolower(date('m', strtotime('Mar'))); // 03
  </code></pre>
  
  <p>What have done wrong?</p>