title: ISO week number in CMD
body: <p>How can I determine the (<a href="https://en.wikipedia.org/wiki/ISO_week_date" rel="noreferrer">ISO 8601</a>) week number in a Windows batch file?</p>
  
  <p>Unfortunately <code>WMIC PATH WIN32_LOCALTIME GET /FORMAT:LIST</code> only has <em>WeekInMonth</em>...</p>
  
  <p>I have found some <a href="http://www.netikka.net/tsneti/info/tscmd149.htm" rel="noreferrer">very</a> <a href="https://stackoverflow.com/a/17457049/357313">complex</a> <a href="http://www.robvanderwoude.com/sourcecode.php?src=week_xp" rel="noreferrer">solutions</a>. Is there no easier way?</p>