public class Date {
	int year;
	int month;
	int day;
	public Date(int yr, int mo, int da){
		year = yr;
		month = mo;
		day = da;
	}
	// advance the day by n
	public void advanceDay(){
		if (day < monthLength()) {
		    day = day + 1;
		}
		else {
			day = 1;
			month++;
		}
	}
	public String toString(){
		return "Year " + year + " Month " + month + " Day " + day;
	}
	public int monthLength(){
		if (month == 2)
			return 28;
		else if (month == 9 || month == 4 || month == 6 || month == 11)
			return 30;
		else
			return 31;
		
	}

}