Here you can find the source of todayInMillis()
public static long todayInMillis()
//package com.java2s; /**/*from w ww .j a v a 2 s. com*/ * Copyright (C) 2013 Open WhisperSystems * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.util.concurrent.TimeUnit; public class Main { public static long todayInMillis() { return TimeUnit.DAYS.toMillis(TimeUnit.MILLISECONDS.toDays(System.currentTimeMillis())); } }