Возврат дат дней рождения

public class Birthdays {
 
    public static void main(String[] args) {
 
        int day = 31;
        int month = 12;
        int year = 1990;
        System.out.println(collectBirthdays(year, month, day));
 
    }
    public static String collectBirthdays(int year, int month, int day) {
 
        LocalDate birthday = LocalDate.of(year, month, day);
        LocalDate todayDate = LocalDate.now();
 
        DateTimeFormatter formatDate = DateTimeFormatter.ofPattern("dd.MM.yyyy - E", Locale.ENGLISH);
        int a = 0;
        String text = "";
 
        StringBuilder sb = new StringBuilder();
 
        while (birthday.isEqual(todayDate) || (birthday.isBefore(todayDate))) {
            text = a + " - " + birthday.format(formatDate);
 
            sb.append(text);
            sb.append(" ");
 
            System.out.println(text);
            a++;
            birthday = birthday.plusYears(1);
        }
        
        return "";
    }
}

public static String collectBirthdays(int year, int month, int day) {
 
        LocalDate today = LocalDate.now().plusDays(1);
        LocalDate birthday = LocalDate.of(year, month, day);
        DateTimeFormatter format = DateTimeFormatter.ofPattern(" - dd.MM.yyyy - E", Locale.ENGLISH);
        int number = 0;
        String text = "";
        while (birthday.isBefore(today)){
            String numberB = String.valueOf(number);
            text = text + numberB + format.format(birthday) + System.lineSeparator();
            number++;
            birthday= birthday.plusYears(1);
        }
        return text;
    }