add a suffix to a date

gistfile1.java

static String getDayOfMonthSuffix(final int n) {
		    if (n >= 11 && n <= 13) {
		        return "th";
		    }
		    switch (n % 10) {
		        case 1:  return "st";
		        case 2:  return "nd";
		        case 3:  return "rd";
		        default: return "th";
		    }
		}