Hi all, I got a response from Kaf who runs https://guff.szub.net
Here’s the code for anyone who comes here looking for a response.
Put this into your theloop.php
<?php
$last = $wpdb->get_var(“SELECT post_modified FROM $wpdb->posts order by post_modified DESC LIMIT 1”);
echo “Last update: ” . mysql2date(get_settings *’date_format’*, $last);
?>
where *’date format’* is the date format you want in php language. Make sure to delete the *’s, they were just there for your reference.
Worked for me.