Get date from gravity form to events organiser

//http://www.stephenharris.info/2012/front-end-event-posting/
//http://www.gravityhelp.com/documentation/page/Gform_after_submission

add_action("gform_after_submission_8", "add_new_event", 10, 2);
function add_new_event($entry, $form){

//getting post
$post = get_post($entry["post_id"]);

//Set the post data - event data

$post_data =array(
    'post_title'=>$entry['1'],
    'post_content'=>$entry['2'],
    'tax_input'=>array(
        'event-venue'=>array($entry['5']),
        'event-category'=>$entry['4'],
    )
);

$start = new DateTime($entry['6'],eo_get_blog_timezone());
$end = new DateTime($entry['18'],eo_get_blog_timezone());
$event_data =array(
    'schedule' =>'once',  //specifies the reoccurrence pattern
    'all_day' =>  1, //1 if its an all day event, 0 if not
    'start' =>  $start, //start date (of first occurrence)  as a datetime object
    'end' => $end,  //end date (of first occurrence)  as a datetime object
);

//Finally, Insert event.
$post_id = eo_insert_event($post_data,$event_data);

}