Advanced Custom Fields -Relationship & The Event Calendar past events

acf-relationship-the-event-calendar.php

<?php 
add_filter( 'acf/fields/relationship/query/key=field_59006ee8b9a7b', 'bea_acf_relationship', 10, 3 );
add_filter( 'acf/load_value/name=featured_event', 'bea_acf_relationship', 10, 3 );

/**
	 *
	 * Display all events in Relationship field ( future, past )
	 *
	 * @param $args
	 * @param $field
	 * @param $object_id
	 *
	 * @return mixed
	 * @author Alexandre Sadowski
	 */
	function bea_acf_relationship( $args, $field, $object_id ) {
		if ( ! class_exists( 'Tribe__Events__Query' ) ) {
			return $args;
		}

		remove_action( 'pre_get_posts', array( 'Tribe__Events__Query', 'pre_get_posts' ), 50 );

		return $args;
	}

This seems to work for me.

add_filter('acf/fields/relationship/query/name=featured_event', 'pull_past_events', 10, 3);
add_filter('acf/load_value/name=featured_event', 'pull_past_events', 10, 3);
function pull_past_events($x, $y, $z)
{
if (class_exists('Tribe__Events__Query')) {
remove_action('pre_get_posts', array('Tribe__Events__Query', 'pre_get_posts'), 50);
}
return $x;
}

@myicicle thanks for your response, i updated the gist