Don't, it's wrong.

86400 seconds sooner/later can be the same day.
86400 seconds sooner/later can be two days earlier/later. 

use DateTime qw( );

my $today     = DateTime->today( time_zone => 'local' );
my $tomorrow  = $today->add     ( days => 1 );
my $yesterday = $today->subtract( days => 1 );

print "Today is:     ", $today    ->strftime('%m/%d/%Y'), "\n";
print "Tomorrow is:  ", $tomorrow ->strftime('%m/%d/%Y'), "\n";
print "Yesterday is: ", $yesterday->strftime('%m/%d/%Y'), "\n";

[download]

Update: Added solution.
Update: Fixed spelling of time_zone. (underscore was missing)

In reply to Re^3: Parsing/regex question by ikegami
in thread Parsing/regex question by vxp

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