将毫秒转换为月份和年份无法正常工作

我正在用Java编写一个程序,它试图将毫秒转换成年、月、日、小时、分钟和秒。

public class convertexercise {
    public static void main(String[] args) {
          System.out.println("Current Time in milliseconds = " + System.currentTimeMillis());
          long[] converter = new long [6];
          converter[0] = System.currentTimeMillis() / (1000 * 60 * 60 * 24 * 365); // years
          converter[1] = System.currentTimeMillis() / (1000 * 60 * 60 * 24 * 30); // months
          converter[2] = System.currentTimeMillis() / (1000 * 60 * 60 * 24); // days
          converter[3] = System.currentTimeMillis() / (1000 * 60 * 60); // hours
          converter[4] = System.currentTimeMillis() / (1000 * 60); // minutes
          converter[5] = System.currentTimeMillis() / 1000; // seconds
          System.out.print(converter[0] + " years, " + converter[1] + " months, " + converter[2] + " days, " + converter[3] + " hours, " + converter[4] + " minutes, " + converter[5] + " seconds.");
    }
}

我的程序能够转换 System.currentTimeMillis()

当我转换成年和月的时候,我到底做错了什么?