#!/usr/bin/perl
use strict;
use warnings;
use 5.012;
use DateTime::Format::Strptime;

(my $str = "2011-04-25T17:07:19-07:00") =~ s/:(\d\d)\z/$1/;

my( @strp ) = (
    DateTime::Format::Strptime->new( pattern => '%FT%T%z', ),
    DateTime::Format::Strptime->new( pattern => '%F %T', )
);

my $date = $strp[0]->parse_datetime( $str ) or die "Cannot parse $str. $!";

say $strp[1]->format_datetime( $date->set_time_zone('UTC') );

__END__
C:\Old_Data\perlp>perl t3.pl
2011-04-26 00:07:19