Write a program or a script that returns the last Sundays of each month of a given year. The year may be given through any simple input method in your language (command line, std in, etc).

Example of an expected output:

./last_sundays 2013
2013-01-27
2013-02-24
2013-03-31
2013-04-28
2013-05-26
2013-06-30
2013-07-28
2013-08-25
2013-09-29
2013-10-27
2013-11-24
2013-12-29


Related tasks
 Day of the week
 Five weekends
 Last Friday of each month


var dt = require('DateTime');
var (year=2016) = ARGV.map{.to_i}...
 
for i in (1 .. 12) {
    var date = dt.last_day_of_month(
        year  => year,
        month => i
    );
 
    while (date.dow != 7) {
        date = date.subtract(days => 1);
    }
 
    say date.ymd;
}