Here you can find the source of calculateMinimalDaysInFirstWeek(Calendar calendar)
public static int calculateMinimalDaysInFirstWeek(Calendar calendar)
//package com.java2s; /*// w ww .jav a 2 s.c om * Copyright 2009 Yodlee, Inc. All Rights Reserved. Your use of this code * requires a license from Yodlee. Any such license to this code is * restricted to evaluation/illustrative purposes only. It is not intended * for use in a production environment, and Yodlee disclaims all warranties * and/or support obligations concerning this code, regardless of the terms * of any other agreements between Yodlee and you." */ import java.util.Calendar; public class Main { public static int calculateMinimalDaysInFirstWeek(Calendar calendar) { Calendar temp = (Calendar) calendar.clone(); temp.set(Calendar.DAY_OF_YEAR, 1); int firstDayOfJan = temp.get(Calendar.DAY_OF_WEEK); return 8 - firstDayOfJan; } }