Here you can find the source of numberOfDaysSinceEpoch(long milliSinceEpoch)
public static long numberOfDaysSinceEpoch(long milliSinceEpoch)
//package com.java2s; /*/*w ww. j av a2 s . c om*/ * Copyright 2010-2016 ksyun.com, Inc. or its affiliates. All Rights Reserved. * * Portions copyright 2006-2009 James Murty. Please see LICENSE.txt * for applicable license terms and NOTICE.txt for applicable notices. * * Licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. * A copy of the License is located at * * http://ksyun.com/apache2.0 * * or in the "license" file accompanying this file. This file is distributed * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either * express or implied. See the License for the specific language governing * permissions and limitations under the License. */ import java.util.concurrent.TimeUnit; public class Main { /** * Returns the number of days since epoch with respect to the given number * of milliseconds since epoch. */ public static long numberOfDaysSinceEpoch(long milliSinceEpoch) { return TimeUnit.MILLISECONDS.toDays(milliSinceEpoch); } }