System.Globalization.JulianCalendar.ToDateTime C# (CSharp) Method

        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era)
        {
            CheckYearEraRange(year, era);
            CheckMonthRange(month);
            CheckDayRange(year, month, day);
            if (millisecond < 0 || millisecond >= MillisPerSecond) {
                throw new ArgumentOutOfRangeException(
                            "millisecond",
                            String.Format(
                                CultureInfo.CurrentCulture,
                                Environment.GetResourceString("ArgumentOutOfRange_Range"),
                                0,
                                MillisPerSecond - 1));
            }

            if (hour >= 0 && hour < 24 && minute >= 0 && minute < 60 && second >=0 && second < 60)
            {
                return new DateTime(DateToTicks(year, month, day) + (new TimeSpan(0, hour, minute, second, millisecond)).Ticks);
            } else
            {
                throw new ArgumentOutOfRangeException(null, Environment.GetResourceString("ArgumentOutOfRange_BadHourMinuteSecond"));
            }
        }