Java tutorial
//package com.java2s; import java.util.Calendar; public class Main { public static int[] getWeekSunday(int year, int month, int day, int pervious) { int[] time = new int[3]; Calendar c = Calendar.getInstance(); c.set(Calendar.YEAR, year); c.set(Calendar.MONTH, month); c.set(Calendar.DAY_OF_MONTH, day); c.add(Calendar.DAY_OF_MONTH, pervious); time[0] = c.get(Calendar.YEAR); time[1] = c.get(Calendar.MONTH) + 1; time[2] = c.get(Calendar.DAY_OF_MONTH); return time; } }