title: How do I find the duration in months, between a particular date and today's date, within SAS?
body: <p>I have created a table below;</p>
  
  <pre><code>DATA test;
  INPUT name$ start_date$;
  CARDS;
  John 20/09/1610.  
  Michelle 26/09/1410.
  Peter 10/03/1510. 
  Kai 05/05/1710.   
  run;
  </code></pre>
  
  <p>I then tried to find the duration in months, between the start_date and today's date, using the code below; But it did not work.</p>
  
  <pre><code>data test3;
  set test3;
  Duration_MONTHS = INTCK('MONTH', start_date, TODAY());
  run;
  </code></pre>
  
  <p>Can someone help resolve the issue please?</p>