title: In an ISO 8601 date, is the T character mandatory?
body: <p>I'm wondering if the following date is ISO8601 compliant :</p>
  
  <pre><code>2012-03-02 14:57:05.456+0500
  </code></pre>
  
  <p>(for sure, 2012-03-02T14:57:05.456+0500 is compliant, but not that much human readable !)
  IOW, is the T between date and time mandatory ?</p>