Office Whisperer

export default (function (o, c) { var proto = c.prototype; proto.weekYear = function () { var month = this.month(); var weekOfYear = this.week(); var year = this.year(); if (weekOfYear === 1 && month === 11) { return year + 1; } if (month === 0 && weekOfYear >= 52) { return year - 1; } return year; }; });