code: function _toordinal(year, month, day) {
        var days_before_year = ((year - 1) * 365) + Math.floor((year - 1) / 4) - Math.floor((year - 1) / 100) + Math.floor((year - 1) / 400);
        var days_before_month = _DAYS_BEFORE_MONTH[month] + (month > 2 && isleap(year) ? 1 : 0);
        return (days_before_year + days_before_month + day);
      }
docs: Calculates the ordinal time from given year, month, day values.
  
  @param {Number} year
  @param {Number} month
  @param {Number} day
  @api private