title: moment - Find name of the day in a given month
body: <p>I'm able to get name of the day using moment + format options. </p>
  
  <pre><code>moment().format('dddd');
  </code></pre>
  
  <p>However it only returns name of day for current month. </p>
  
  <p>How can I specify a specific month? say name of day for June 30 2017. </p>
  
  <p>Thanks </p>