code: function(year, month, day) {
  			var date = this._validate(year, this.minMonth, this.minDay, $.calendars.local.invalidYear);
  			var year = this._t2gYear(date.year());
  			return gregorianCalendar.weekOfYear(year, date.month(), date.day());
  		}
docs: Determine the week of the year for a date - ISO 8601.
  @memberof TaiwanCalendar
  @param year {CDate|number} The date to examine or the year to examine.
  @param [month] {number} The month to examine.
  @param [day] {number} The day to examine.
  @return {number} The week of the year.
  @throws Error if an invalid date or a different calendar used.