You can also change the parameters that are used in the template for the matches.
Since you’re already overwriting the match template, I would suggest to add another filter in that same extension plugin. You need to hook into the following filter: footballpool_predictionform_match_template_params
. And then return a newly formatted date in the callback function. Something like this *:
function change_params( $params, $match_id, $user_id, $is_user_page ) {
$params['match_datetime_formatted'] = date_i18n( 'your format', $params['match_timestamp'] );
return $params;
}
* untested