title: XSL to convert UTC time to local datetime with an offset compare
body: <p>We receive datetime elements relative to the UTC time like <code>2004-04-12T13:20:00Z</code>.</p>
  
  <p>And we would like to output the datetime in the local datetime, that is expressed with an offset relative to the UTC time like <code>2004-04-12T12:20:00-01:00</code>.</p>
  
  <p>Can someone help to achieve this in XSLT?<br>
  Or does exist a function-template to achieve this?</p>