Five weekends

Five weekends
You are encouraged to solve this task according to the task description, using any language you may know.

The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.

The task

1. Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
2. Show the number of months with this property.
3. Show at least the first and last five dates, in order.

Java

<lang java>import java.util.Calendar; import java.util.GregorianCalendar;

public class FiveFSS {

     //dreizig tage habt september...
     private static int[] month31 = {Calendar.JANUARY, Calendar.MARCH, Calendar.MAY,
           Calendar.JULY, Calendar.AUGUST, Calendar.OCTOBER, Calendar.DECEMBER};
     public static void main(String[] args){
           for(int year = 1900; year <= 2100; year++){
                 for(int month:month31){
                       Calendar date = new GregorianCalendar(year, month, 1);
                       if(date.get(Calendar.DAY_OF_WEEK) == Calendar.FRIDAY){
                             //months are 0-indexed in Calendar
                             System.out.println((date.get(Calendar.MONTH) + 1) + "-" + year);
                       }
                 }
           }
     }

}</lang> Output (middle results cut out):

3-1901
8-1902
5-1903
1-1904
7-1904
12-1905
3-1907
5-1908
1-1909
10-1909
7-1910
...
12-2090
8-2092
5-2093
1-2094
10-2094
7-2095
3-2097
8-2098
5-2099
1-2100
10-2100