code: function(date) {
          var start = this.findMonthStart(date);
          var nextMonth = this.add(start, this.MONTH, 1);
          var end = this.subtract(nextMonth, this.DAY, 1);
          return end;
      }
docs: Gets the last day of a month containing a given date.
  @method findMonthEnd
  @param {Date} date The JavaScript Date used to calculate the month end
  @return {Date}  The JavaScript Date representing the last day of the month