public static boolean datumsPruefung(int day, int month, int year)
	{
		if (year < 1900)
		{
			return false;
		}

		if (month < 1 || month > 12)
		{
			return false;
		}

		if (istSchaltjahr(year) == true)
		{
			if (day < 1 || day > arrSchaltjahr[month])
			{
				return false;
			}
		}
		else
		{
			if (day < 1 || day > arr[month])
			{
				return false;
			}
		}
		return true;
	}