title: Where do I find Date class in Zend Framework 2.0?
body: <p>I have started my ZF2 application from Skeleton-Application.
  I want instance of Date class in one of my controller.
  I tried to search Date.php class under... </p>
  
  <blockquote>
    <p>library\Zend\</p>
  </blockquote>
  
  <p>but could not found.
  Does ZF2 has not Date.php at all or I need to palce it from somewhere else?</p>