#!/usr/bin/perl

use strict;
use warnings;

use POSIX qw(strftime);
use Time::ParseDate;

die "Need year!\n" unless @ARGV;

my $time_t = parsedate("01/01/" . $ARGV[0]);
$time_t += 86400 until ((localtime($time_t))[6] == 1);
print map { strftime("%F\n", localtime($_)) }
           grep { (((localtime($_))[5] + 1900) == $ARGV[0]) }
                 $time_t + 86400 * 7 * $_ for (0 .. 53);