Java tutorial
//package com.java2s; //License from project: Apache License import java.util.Calendar; public class Main { public static long getYearMonthDay(long date) { Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(date); calendar.set(Calendar.HOUR_OF_DAY, 0); calendar.set(Calendar.SECOND, 0); calendar.set(Calendar.MINUTE, 0); calendar.set(Calendar.MILLISECOND, 0); return calendar.getTimeInMillis(); } }