title: UTC vs ISO format for time
body: <p>I'm trying to understand the difference between UTC and ISO formats and when to use what when transferring messages between servers.  So When I try the following this is what I get</p>
  <pre><code>new Date().toISOString()
  &quot;2019-11-14T00:55:31.820Z&quot;
  
  new Date().toUTCString()
  &quot;Thu, 14 Nov 2019 00:55:16 GMT&quot;
  </code></pre>
  <p>I understand the ISO format and its a standard used to represent time, but what is the purpose of UTC and where would I use them?</p>