- date_default_timezone_set: documentation ( source)
<?php
date_default_timezone_set('Europe/Amsterdam');
$date = '2014-08-07 10:03:41';
$date = new DateTime($date, new DateTimeZone('UTC'));
$date->setTimezone(new DateTimeZone('Europe/Amsterdam'));
echo $date->format('Y-m-d H:i:s');