Don't use localtime in the first place. Use time or gmtime and POSIX::strftime instead.

#!/usr/bin/perl

use strict;
use warnings;
use POSIX qw(strftime);
my $start = time();
sleep 10;
my $end = time();
my $duration = $end - $start;
print "It took me $duration seconds\n";
my $start_date = strftime "%Y-%m-%d %H:%M:%S", localtime($start);
my $end_date = strftime "%Y-%m-%d %H:%M:%S", localtime($end);
print "I was started on $start_date and ended on $end_date\n";

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Updated after Aldebaran actually checked the code.

In reply to Re: Finding Time Difference of Localtime by Corion
in thread Finding Time Difference of Localtime by monkfan

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