title: Min/Max Date/DateTime in JodaTime
body: <p>Is there any way in JodaTime to construct a Date/DateTime which will always be smaller/larger than any other Date/DateTime? Something along the lines of </p>
  
  <pre><code>DateTime bigBang = DateTime.xxx();
  DateTime endOfUniverse = DateTime.yyy();
  </code></pre>
  
  <p>Constraint: I don't want to use the standard Java Date libraries.</p>