Events Calendar + Rank Math SEO: Noindex past events automatically

gistfile1.txt

// That snippet was tested using the following plugin versions:
// The Events Calendar v6.2.9
// Rank Math SEO v1.0.210 

// Check if Events Calendar and Rank Math plugins are enabled
if (class_exists('Tribe__Events__Main') && class_exists('RankMath')) {
	add_filter( 'rank_math/frontend/robots', function( $robots ) {
		global $post;
		if (!is_admin() && is_singular() && @$post->post_type == 'tribe_events') {
			if (strtotime(tribe_get_end_date($post->ID, true, 'r')) < time()) {
				unset( $robots['index'] );
				$robots['noindex'] = 'noindex';
			}
			return $robots;
		}
	});
}