The Events Calendar - Filter Bar: Redirect all Post Tags to their Event view.

functions.php

<?php

/**
 * The Events Calendar - Filter Bar: Redirect all Post Tags to their Event view.
 *
 * Does not work if Filter Bar is not active. Should only be used if you use
 * Post Tags *solely* for Events and not for Posts. Example redirect:
 * From: http://example.dev/tag/around-the-house/
 *   To: http://example.dev/events/?tribe_tags[]=53
 *
 * @link https://gist.github.com/cliffordp/51586f8c6f98ed9e1e1f2adbdd1dcb0a
 * @link https://gist.github.com/cliffordp/23536ca604bca074a9d2f169277cfe59 Similar snippet but for general site searches to Tribe Bar search (does not require Filter Bar).
 */
add_action( 'template_redirect', 'cliff_redirect_post_tag_to_events_tag_view' );
function cliff_redirect_post_tag_to_events_tag_view() {
	if (
		! is_tag()
		|| ! function_exists( 'tribe_get_events_link' )
		|| ! class_exists( 'Tribe__Events__Filterbar__View' )
	) {
		return;
	}

	$tag_object = get_queried_object();

	$url = add_query_arg( 'tribe_tags[]', $tag_object->term_id, tribe_get_events_link() );

	wp_redirect( esc_url_raw( $url ) );
	exit;
}