The problem here is that you're not dereferencing $self correctly and further to that you're not quoting your keys. You probably want something like this

use Data::Dumper;

my $self = {};

@$self{qw/sec min hour mday mon year wday yday isdst/} = localtime();

print Dumper($self);

__output__

$VAR1 = {
          'isdst' => 0,
          'yday' => 178,
          'wday' => 5,
          'mday' => 28,
          'min' => 34,
          'year' => 102,
          'mon' => 5,
          'hour' => 14,
          'sec' => 25
        };
[download]

Check out perlref and perlreftut for more info about dereferencing.
HTH

_________
broquaint