title: How to get current month, previous month and two months ago
body: <p>I need a function that will return three strings:</p>
  
  <ol>
  <li>first string will contain the current month and the current year.</li>
  <li>second string will contain the previous month and current year.</li>
  <li>third string will contain two months ago and current year.</li>
  </ol>
  
  <p>This, of course, should also work if current month is January, for example.</p>
  
  <p>So right now, the results should be:</p>
  
  <ul>
  <li>September 2015</li>
  <li>August 2015</li>
  <li>July 2015</li>
  </ul>