If you want to loop through the list with for you'll still have to use parens around the list that qw generates.

$ perl -wE 'for my $d qw^ 2006-10-21 15.01.2007 10/31/2005 ^ { say $d 
+}'
syntax error at -e line 1, near "$d qw^ 2006-10-21 15.01.2007 10/31/20
+05 ^"
Execution of -e aborted due to compilation errors.

$ perl -wE 'for my $d (qw^ 2006-10-21 15.01.2007 10/31/2005 ^) { say $
+d } '
2006-10-21
15.01.2007
10/31/2005
[download]

Note that I am using ^ for the qw delimiter to disambiguate from the list parens.

Also note that you don't need the list parens if using a postfix for:

$ perl -wE 'say $_ for qw^ 2006-10-21 15.01.2007 10/31/2005 ^'
2006-10-21
15.01.2007
10/31/2005
[download]

Hope this helps!