title: Why does Chrome Dev Tool show a dates __proto__ as Invalid Date?
body: <p>I know <code>__proto__</code> is deprecated (or not part of the standard) and all that but I'm still curious as to what it means when it says Invalid Date when I look at the <code>__proto__</code> value of..</p>
  
  <pre><code>var myDate = new Date(1331869050000);
  </code></pre>