If you don't mind installing a module, here is how to use DateTime::Event::Recurrence (I guessed the parameters from your example):

use DateTime::Event::Recurrence;

my $cal = DateTime::Event::Recurrence->yearly( 
    weeks => 5, 
    week_start_day => 'su' ); 

my $dt = DateTime->new( year=> 2004 ); 
for ( 1 .. 10 ) { 
    $dt = $cal->next( $dt ); 
    print $dt, "\n" 
}
[download]

2004-02-01T00:00:00
2005-01-30T00:00:00
2006-01-29T00:00:00
2007-01-28T00:00:00
2008-01-27T00:00:00
2009-02-01T00:00:00
2010-01-31T00:00:00
2011-01-30T00:00:00
2012-01-29T00:00:00
2013-01-27T00:00:00