title: PHP Carbon incorrectly formatting UNIX timestamp
body: <p>I receive a UNIX timestamp from a URL like so:</p>
  
  <pre><code>/api/v1/order_variations/60?d=1508364000000
  </code></pre>
  
  <p>When I retrieve and try to convert the timestamp into a readable format, Carbon outputs the incorrect date.</p>
  
  <pre><code>$timestamp = (int)$request-&gt;input('d');
  $date = Carbon::createFromTimestamp($timestamp)-&gt;format('j F, Y');
  dd($date);
  </code></pre>
  
  <p>The value of <em>$timestamp</em> is <strong>1508364000000</strong>.</p>
  
  <p>Carbon converts this to <strong>"25 February, 49768"</strong> but it should be <strong>"19 October, 2017"</strong> </p>
  
  <p>If I use:</p>
  
  <pre><code>Carbon::createFromTimeStampUTC($timestamp)-&gt;toDateTimeString(); 
  </code></pre>
  
  <p>I get the same result.</p>
  
  <p>Any ideas what I could be doing wrong? </p>