Month not displaying with this jquery

I am trying to get the month element show up on the following html, and it's showing me wrong number, I need to display the name of the month instead of number.

This is my HTML

<div class="card-expiration-date">
    <label>Expires</label>
     <div></div>
 </div>

This is my jQuery

$('#card-expiration-month, #card-expiration-year').change(function(){
    m = $('#card-expiration-month option').index($('#card-expiration-month option:selected'));
    m = (m < 10) ? '0' + m : m;
    y = $('#card-expiration-year').val().substr(2,2);
    $('.card-expiration-date div').html(m + '/' + y);
})

This is my code in Laravel 5.2

<fieldset class="fieldset-expiration">
  <label for="card-expiration-month">Expiration date</label>
  
  
  </fieldset>

via Chebli Mohamed