Wordpress: get date from date custom field

gistfile1.txt

<?php

//PHP > 5.3
$date = DateTime::createFromFormat('Ymd', get_field('date'));
echo $date->format('d/m');

//PHP < 5.3
$date = get_field('date');

// extract d/m
$y = substr($date, 0, 4);
$m = substr($date, 4, 2);
$d = substr($date, 6, 2);

// create UNIX
$time = strtotime("{$d}-{$m}-{$y}");

// format date (23/11/1988)
echo date('d/m', $time);