How do I find the date of penance and prayer?

I wanna find out the date of penance and prayer.

The penance and prayer has a special rule.

Always a Wednesday and 4 Sundays before Christmas. The first Christmas is at 24.12.

I set the month at 12. The for-loop start at day=24 and its decrease every time. I have a problem that its not go to the month 11 and start from that length.

weekdayInYear => give me (0 = Sunday and 3 = Wednesday)

The if-Statement if (weekdayInYear==3) get never true. I know why it gets never true but I dont know how to fix it.

multiplicator is for the repeat time amount.

this.holidayMap.put is a HashMap with String and Event. Event takes a String name of the holidayname.

int month = 12;
    for (int day = 24; day<= getLengthOfMonth(year, month); day--) {
            int daynumber = calenderFunction.daynumber(day, month, year);
            int weekdayInYear = getWeekDayInYear(year, daynumber);
            multiplicator = 0;
            if (weekdayInYear == 0) {
                multiplicator++;
                if (multiplicator == 4) {
                    if (weekdayInYear == 3) {
                        this.holidayMap.put(getTwoLetter(day)+"."+getTwoLetter(month),new Event("penance and prayer"));
                    }
                }
            }

        }

Sadly, i cant use the Calender class of Java.

Best regards Gordon