title: .clone is not a function
body: <p>I'm trying to get the start date of a day and the end date. Now to do this I've written this code:</p>
  
  <pre><code>var date_start_temp = $('#calendar').fullCalendar('getView').start;
  console.log(date_start_temp)
  var date_start = date_start_temp.clone().utc().format("ddd MMM DD YYYY HH:mm:ss");
  var date_end = date_start.clone().startOf('day').add(1, 'day').format("ddd MMM DD YYYY HH:mm:ss");
  </code></pre>
  
  <p>The console.log returns this:</p>
  
  <blockquote>
    <p>Tue Nov 10 2015 01:00:00 GMT+0100 (ora solare Europa occidentale)</p>
  </blockquote>
  
  <p>but in the next line I get this error:</p>
  
  <blockquote>
    <p>date_start_temp.clone(...).utc is not a function</p>
  </blockquote>
  
  <p>and I don't know why. I just want to get this final result:</p>
  
  <p><strong>date_start</strong></p>
  
  <blockquote>
    <p>Tue Nov 10 2015 00:00:00 </p>
  </blockquote>
  
  <p><strong>date_end</strong></p>
  
  <blockquote>
    <p>Wed Nov 11 2015 00:00:00 </p>
  </blockquote>
  
  <p>How you can see I've set the hours to 0 and remove the GMT, I don't want the GMT. How I can achieve this??</p>