Java, I dont understand why this is happening, variable changes

    public void askForDate(Scanner in) {
    System.out.println("Please enter the date that the vehicle entered the car park in this format dd/mm/yyyy :");
    String enteredDate = in.nextLine();

    //This array will hold the 3 elements of which the date is made up of, day, month and year, and this method returns it.
    String[] dateEnteredSplit = enteredDate.split("/");

    //I am using the split method to seperate each number, which returns an array, so I am assigning that array to the dateEnteredSplit array.
    //dateEnteredSplit = enteredDate.split("/");
    //So now the first element holds the day, second the month, and the third element holds the year.

    //System.out.println(Arrays.toString(dateEnteredSplit));

    //Assigning each element and converting them to integers.
    int day = Integer.parseInt(dateEnteredSplit[0]);
    int month = Integer.parseInt(dateEnteredSplit[1]);
    int year = Integer.parseInt(dateEnteredSplit[2]);

    **System.out.println("day: " + day + "  month: " + month + "  year: " + year);**

    //The loop will be entered if any of the values are wrong. which will use recursion to call this method again for a chance to enter the date again.
    while (!(day >= 1 && day <= 31) || !(month >= 1 && month <= 12) || !(year > 1000 && year < 5000)) {
        **System.out.println("day: " + day + "  month: " + month + "  year: " + year);**
        //Im calling these methods to inform which one specifially was wrong so they know what they need to change.
        this.setDay(day);
        this.setMonth(month);
        this.setYear(year);

        dateEnteredSplit[0] = "0";
        askForDate(in);
    }

    //I then assign any correct value into the object attribute because the while loop is either finished or not entered at all. 
    //No need to use setDay etc. here because the checks have been done above in the while loop.
    this.day = day;
    this.month = month;
    this.year = year;  
}

Ok that is a method in a class. It asks for input in the format dd/mm/yyyy

If the first time I input 12/1/1996 it works, but if I enter a wrong date for example like this first, 123/123/123 and the enter a correct date for example 12/1/1996, it still enters the loop.

After debugging, the first line that is bold, the values are different from the second line that is bold, its like the values are changing by their own.

What is the problem here? I have been trying to find out in the past 1 hour.

Thanks in advance!