import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

public class Main {

    public static void main(String[] args) {
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("MMM dd, YYYY");
        LocalDate localdate = LocalDate.of(2021, 12, 31);
        System.out.println(localdate);
        System.out.println(dtf.format(localdate));
    }
}