Please help me with the following.

I would like a different date format (dutch date format) for the node published by line.

Within the normal node.page.tpl it is possible.
what do i need to change to make it work under Async?

function async_preprocess_node(&$variables) {
$variables['submitted'] = t('Published by !username on !datetime', array('!username' => $variables['name'], '!datetime' => $variables['date']));
if ($variables['view_mode'] == 'full' && node_is_page($variables['node'])) {
$variables['classes_array'][] = 'node-full';
}
}