public static uint CalculateSeedGen3(DateTime time)
        {
            DateTime start;
            if (time.Year <= 1999)
                start = new DateTime(1900, 12, 31);
            else if (time.Year == 2000)
                start = new DateTime(1999, 12, 31);
            //year 2001 or later
            else
                start = new DateTime(2000, 12, 31);
            TimeSpan span = time - start;
            var d = (uint)span.TotalDays;
            var h = (uint)time.Hour;
            var m = (uint)time.Minute;

            uint v = 1440 * d + 960 * (h / 10) + 60 * (h % 10) + 16 * (m / 10) + m % 10;
            var x = (uint)Math.Floor((double)v / 65536);
            uint y = v % 65536;

            return x ^ y;
        }