Hrmmm, one wonders if there's any time related events that occur near the beginning of November that might be germane . . .

Update: And personally I'd just use DateTime as it does the right thing easily.

use strict;
use DateTime;
my $start = DateTime->new( month => 11, day => 1, year => 2008 );
my $end = $start->clone->add( days => 6 );
print "Start: ", $start->ymd, "\tend: ", $end->ymd, "\n";
__END__
Start: 2008-11-01 end: 2008-11-07
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Granted that's not "out of the box" either, but I'd be more worried about correctness than an additional install.