title: moment.js - change format of already formatted past date
body: <p>I need to get a past date with moment.js (<a href="http://momentjs.com/" rel="noreferrer">http://momentjs.com/</a>) which I receive in specific format:</p>
  
  <pre><code>moment('31.10.2013', 'dd.mm.yy');
  </code></pre>
  
  <p>That returns me a strange response where I see a current date in <code>_d</code> option:</p>
  
  <pre><code>// returns
  _a: Array[7]
  _d: Wed Nov 06 2013 00:10:00 GMT+0200 (EET)
  _f: "dd.mm.yy"
  _i: "26.10.2013"
  _isUTC: false
  _l: undefined
  _pf: Object
  _strict: undefined
  </code></pre>
  
  <p>I assume that is the problem when I do formatting:</p>
  
  <pre><code>moment('31.10.2013', 'dd.mm.yy').format('YYYY/MM/DD');
  // returns current date (why??!)
  // "2013/11/06"
  </code></pre>
  
  <p>So what is wrong here, could I format the past date?</p>