title: How to convert UTC time to unix timestamp
body: <p>I am looking for an option to convert UTC time string to unix timestamp.</p>
  
  <p>The string variable I have is <code>02/28/2016 10:03:46 PM</code> and it needs to be converted to a unix timestamp like <code>1456693426</code></p>
  
  <p>Any idea how to do that?</p>