And further illustrating my noob-ness, I didn't include the entire updated script so it actually made sense. Sorry. Here it is:
use strict;
use warnings;
use Time::Piece;
my $ctime = Time::Piece->new;
my $oldtime = Time::Piece->strptime('Dec 19 17:44:00 2016', '%b %d %T
+%Y');
$oldtime = $oldtime - $ctime->tzoffset;
print "The current time is $ctime\n";
print "The old time is ", $oldtime + $ctime->tzoffset, "\n";
my $halfago = $ctime - 1800;
print "Half an hour ago is $halfago\n";
if ($oldtime > $halfago)
{
print "Old time is within a half hour\n";
}
else
{
print "Old time is outside a half hour\n";
}
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