public void setBirthday(int b_d, int b_m, int b_y) {
		//Set borrower's birthday. If the date is incorrect, then set all as 0 in order to be checked later. 
		if (b_d <= 31 && b_m <= 12 && b_y < 2015) {
			if (b_m == 2 && b_d > 28){
			birthday.day = 0;
			birthday.month = 0;
			birthday.year = 0;
			}
			else{
			birthday.day = b_d;
			birthday.month = b_m;
			birthday.year = b_y;
			}
		} else {
			birthday.day = 0;
			birthday.month = 0;
			birthday.year = 0;
		}
	}