private String calcWeekDay(final String input) throws ParseException {

			String res = "";

			String y,m,newInput;

			StringTokenizer st = new StringTokenizer(input,"-");
			y=st.nextToken();
			m=st.nextToken();

			newInput = new StringBuilder()
				.append(y)
				.append("-")
				.append(Integer.parseInt(m)+1).toString();

			Date date;

			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

			String sdfSource = new StringBuilder()
				.append(newInput)
				.append("-")
				.append(VALUE_DAY)
				.toString();

			date = sdf.parse(sdfSource);

			sdf.applyPattern("EEEE");
			res = sdf.format(date).toUpperCase();

			return res;
		}