title: In javascript, how to get timezone value in UTC format for new Date(2017,05,31).toISOString()?
body: <p>How to get timezone value for new Date(2017,05,31).toISOString()? It always comes as 000Z for any Date when the date is passed to the Date constructor. But for new Date().toISOString(), it gives the the timezone value.</p>
  
  <pre><code>new Date(2017,05,31).toISOString() gives "2017-05-30T18:30:00.000Z"
  </code></pre>
  
  <p>and new Date().toISOString() gives "2017-06-07T15:29:23.692Z". How to get timezone in UTC format for the past dates?</p>