#!/usr/bin/perl
use strict;
use warnings;

use DateTime;
use DateTime::Event::Recurrence;
use DateTime::Format::Strptime;

my $strp = DateTime::Format::Strptime->new(
					pattern => '%Y-%m-%d %T',
        );
my $datf = qq{2012-01-01 04:00:00};
my $datt = qq{2012-01-02 23:00:00};
		
my $start = $strp->parse_datetime($datf);
my $end = $strp->parse_datetime($datt);

my $day_set = DateTime::Event::Recurrence->daily(
						hours => [7, 22], 
);

my $it = $day_set->iterator
			(
			start  => $start->truncate(to=>"hour"),
			before => $end->truncate(to=>"hour"),
			);
								
while ( my $dt = $it->next() )
{
	print $dt->datetime(), "\n";
}