title: Time difference in seconds between given two dates
body: <p>I have two dates as follows:</p>
  
  <pre><code>2019-01-06 00:02:10 | END
  2019-01-05 23:52:00 | START
  </code></pre>
  
  <p>How could I calculate and print the difference between START and END dates in seconds?</p>
  
  <p>For above case I would like to get something like:</p>
  
  <pre><code>610
  </code></pre>