title: Week day and moment js
body: <p>I have this code:</p>
  
  <pre><code>var day = $("#date-filter").val();
  </code></pre>
  
  <p>The value of this input is: "22/03/2016".</p>
  
  <p>I need week day.</p>
  
  <p>I tried to do it in 2 ways but it does not work.</p>
  
  <p>1) <code>moment(day).day()</code></p>
  
  <p>2) <code>moment($("#date-filter").val()).day()</code></p>