Java tutorial
//package com.java2s; import java.util.Calendar; import java.util.Date; public class Main { public static boolean sameDay(long timestamp1, long timestamp2) { return sameDay(new Date(timestamp1), new Date(timestamp2)); } private static boolean sameDay(Date a, Date b) { Calendar cal1 = Calendar.getInstance(); Calendar cal2 = Calendar.getInstance(); cal1.setTime(a); cal2.setTime(b); return cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR) && cal1.get(Calendar.DAY_OF_YEAR) == cal2.get(Calendar.DAY_OF_YEAR); } }