public static Set<Month> getMonthBySeason(Season season) {
		Set<Month> months = new HashSet<Month>();
		switch (season) {
		case SUMMER: {
			months.add(Month.JUN);
			months.add(Month.JUL);
			months.add(Month.AUG);
			break;
		}
		case AUTUMN: {
			months.add(Month.SEPT);
			months.add(Month.OCT);
			months.add(Month.NOV);
			break;
		}
		case WINTER: {
			months.add(Month.DEC);
			months.add(Month.JAN);
			months.add(Month.FEB);
			break;
		}
		case SPING: {
			months.add(Month.MAR);
			months.add(Month.APR);
			months.add(Month.MAY);
			break;
		}
		}
		return months;
	}