I'd use DateTime:

$ cat 641322.pl
use strict;
use warnings;

use DateTime;
my $dt1 = DateTime->from_epoch( epoch => 1135202400 );
my $dt2 = DateTime->from_epoch( epoch => 1188252000 );
$dt1->add( hours => 2 ); # adjust to midnight

while ($dt2 > $dt1){
  print $dt1->ymd() . q{ } . $dt1->hms();
  $dt1->add( days => 1 );
}
__END__

$ perl -wl 641322.pl | head
2005-12-22 00:00:00
2005-12-23 00:00:00
2005-12-24 00:00:00
2005-12-25 00:00:00
2005-12-26 00:00:00
2005-12-27 00:00:00
2005-12-28 00:00:00
2005-12-29 00:00:00
2005-12-30 00:00:00
2005-12-31 00:00:00
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