code: function(year, month, day) {
  			var valid = $.calendars.baseCalendar.prototype.isValid.apply(this, arguments);
  			if (valid) {
  				year = (year.year != null ? year.year : year);
  				valid = (year >= 1276 && year <= 1500);
  			}
  			return valid;
  		}
docs: Determine whether a date is valid for this calendar.
  @memberof UmmAlQuraCalendar
  @param year {number} The year to examine.
  @param month {number} The month to examine.
  @param day {number} The day to examine.
  @return {boolean} <code>true</code> if a valid date, <code>false</code> if not.