Date.java

import java.util.Calendar;

public class AddDates {

    public static void main(String[] args) {

        Calendar c1 = Calendar.getInstance();

        Calendar c2 = Calendar.getInstance();

        Calendar cTotal = (Calendar) c1.clone();

        cTotal.add(Calendar.YEAR, c2.get(Calendar.YEAR));

        cTotal.add(Calendar.MONTH, c2.get(Calendar.MONTH) + 1); // Zero-based months

        cTotal.add(Calendar.DATE, c2.get(Calendar.DATE));

        cTotal.add(Calendar.HOUR_OF_DAY, c2.get(Calendar.HOUR_OF_DAY));

        cTotal.add(Calendar.MINUTE, c2.get(Calendar.MINUTE));

        cTotal.add(Calendar.SECOND, c2.get(Calendar.SECOND));

        cTotal.add(Calendar.MILLISECOND, c2.get(Calendar.MILLISECOND));

        System.out.format("%s + %s = %s", c1.getTime(), c2.getTime(), cTotal.getTime());

    }

}