title: identify directory named for the most recent date
body: <p>I name output folders for the date that I run a program on. So, I have the following folders in my directory:</p>
  
  <pre><code>2011.05.18
  2011.06.30
  2011.07.07
  2011.07.27
  2011.08.03
  </code></pre>
  
  <p>How can I automatically identify the most recent one from the command line (e.g. so that I can make a symbolic link to files in it)?</p>