Use the Time::Piece module.

#!/usr/bin/perl

use warnings;
use strict;
use Time::Piece;

my $time = Time::Piece->new;
my $datetime = $time->strftime("%b %d, %Y");

print "$datetime\n";

This will produce a result in this format.

Jan 16, 2019

Following are commonly used options.

Future / Past date

The add_years option can be used to add or subtract years. This will go back 1 year.

my $lastYear = $time->add_years(-1)->strftime(%b %d, %Y);

However, consider it is January.

If you use add_months(-1) then it becomes December, and you would also have to include add_years(-1). This can get unruley quickly. There is where Time::Seconds comes in handy.

#!/usr/bin/perl

use strict;
use warnings;
use Time::Piece;
use Time::Seconds;

my $time           = Time::Piece->new;
my $one_month_forward  = ($time + ONE_MONTH)->strftime("%Y%m%d");
my $two_month_forward  = ($time + ONE_MONTH * 2)->strftime("%Y%m%d");
my $one_month_backward = ($time - ONE_MONTH)->strftime("%Y%m%d");
my $two_month_backward = ($time - ONE_MONTH * 2)->strftime("%Y%m%d");
my $one_day_forward    = ($time + ONE_DAY)->strftime("%Y%m%d");
my $one_day_backward   = ($time - ONE_DAY)->strftime("%Y%m%d");
my $two_day_backward   = ($time - ONE_DAY * 2)->strftime("%Y%m%d");

print "\$two_month_backward = $two_month_backward \n";
print "\$one_month_backward = $one_month_backward \n";
print "\$one_month_forward  = $one_month_forward \n";
print "\$two_month_forward  = $two_month_forward \n";
print "\$two_day_backward   = $two_day_backward \n";
print "\$one_day_backward   = $one_day_backward \n";
print "\$one_day_forward    = $one_day_forward \n";