And followings are code changed by your recommendation.

Not really, you're still using timelocal instead of timegm_modern (and the month numbers are still off by one).

As I said, for best results, use DateTime. For the other solutions, if your local system isn't set to the right time zone, you could try forcing it via local $ENV{TZ}='Asia/Seoul';, but that's not guaranteed to work and may not be portable.

use warnings;
use strict;

my $date = "Nov 23 22:31:12 2019 GMT";
print "Input date: $date\n";

{
    use Time::Local qw/timegm_modern/;
    my %MONTH_NAMES = ( Jan=>0, Feb=>1, Mar=>2, Apr=>3, May=>4,
        Jun=>5, Jul=>6, Aug=>7, Sep=>8, Oct=>9, Nov=>10, Dec=>11 );
    my ($mon,$mday,$hour,$minute,$sec,$year) = split /\s+|:/, $date;
    my $tm = timegm_modern($sec,$minute,$hour,$mday,
        $MONTH_NAMES{$mon},$year);
    print "timegm+gmtime: ", gmtime($tm)." GMT\n";
    print "timegm+localtime: ", localtime($tm)." Local\n";
}
# - OR -
{
    use Time::Piece;
    my $tm = Time::Piece->strptime($date, '%b %d %H:%M:%S %Y %Z');
    print "Time::Piece: ", $tm->strftime, "\n";
    print "Time::Piece+localtime: ", localtime($tm->epoch)." Local\n";
}
# - OR -
{
    use DateTime;
    use DateTime::Format::Strptime;
    my $strp = DateTime::Format::Strptime->new(
        pattern => '%b %d %H:%M:%S %Y %Z', on_error => 'croak');
    my $dt = $strp->parse_datetime($date);
    print "DateTime: ",$dt->strftime("%Y-%m-%dT%H:%M:%S%z (%Z)"),"\n";
    $dt->set_time_zone('Asia/Seoul');
    print "DateTime: ",$dt->strftime("%Y-%m-%dT%H:%M:%S%z (%Z)"),"\n";
}

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In reply to Re^5: date and time difference by haukex
in thread date and time difference by invisiblehand

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