code: function interpretTwoDigitYear(year) {
    const thisYear = new Date().getFullYear();
    const thisCentury = thisYear - (thisYear % 100);
    const centuries = [thisCentury, thisCentury - 100, thisCentury + 100].sort(function(a, b) {
      return Math.abs(thisYear - (year + a)) - Math.abs(thisYear - (year + b));
    });
    return year + centuries[0];
  }
docs: Give this function a 2 digit year it'll return with 4.
  
  @example
  interpretTwoDigitYear(15);
  // => 2015
  interpretTwoDigitYear(97);
  // => 1997
  @param {number} year
  @returns {number}
  @private