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my @sundays = ([]); my @date = (2005, 1, 1); ... # Now, $sundays[1] == ( 2005, 1, 2 ) # $sundays[2] == (2005, 1, 9 ) # etc.
my @sunday_date = Monday_of_Week(Week_of_Year( @starting_date )); $sunday_date[2]--;