Here you can find the source of isHolyday(Calendar c)
public static boolean isHolyday(Calendar c)
//package com.java2s; /**/* www . j a v a 2s. c o m*/ * This file is part of JEMMA - http://jemma.energy-home.org * (C) Copyright 2013 Telecom Italia (http://www.telecomitalia.it) * * JEMMA is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License (LGPL) version 3 * or later as published by the Free Software Foundation, which accompanies * this distribution and is available at http://www.gnu.org/licenses/lgpl.html * * JEMMA is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License (LGPL) for more details. * */ import java.util.Calendar; public class Main { private static int easterDay, easterMonth, mondayEasterDay, mondayEasterMonth; public static boolean isHolyday(Calendar c) { int month = c.get(Calendar.MONTH); int dayOfMonth = c.get(Calendar.DAY_OF_MONTH); if (month == Calendar.JANUARY) { if (dayOfMonth == 1) return true; // Capodanno if (dayOfMonth == 6) return true; // Epifania } if (month == Calendar.APRIL && dayOfMonth == 25) return true; // Liberazione Italia if (month == Calendar.MAY && dayOfMonth == 1) return true; // Festa del lavoro if (month == Calendar.JUNE && dayOfMonth == 2) return true; // Festa della Repubblica Italia if (month == Calendar.AUGUST && dayOfMonth == 15) return true; // Assunzione if (month == Calendar.NOVEMBER && dayOfMonth == 1) return true; // Ognissanti if (month == Calendar.DECEMBER) { if (dayOfMonth == 8) return true; // Immacolata Concezione if (dayOfMonth == 25) return true; // Natale if (dayOfMonth == 26) return true; // Santo Stefano } if (month == easterMonth && dayOfMonth == easterDay) return true; // Pasqua if (month == mondayEasterMonth && dayOfMonth == mondayEasterDay) return true; // Pasquetta return false; } }