orderby date

I Created a data field Thus:

add_filter( 'rwmb_meta_boxes', 'register_meta_boxes' );
function register_meta_boxes( $meta_boxes ) {
	$meta_boxes[] = array(
		'title' => __( 'Data corso/evento'),
        'post_types' => 'product',
		'fields' => array(
			array(
				'name' => __( 'Giorno evento' ),
				'id'   => 'day_event',
				'type' => 'date',
				'js_options' => array(
					'autoSize'        => true,
					'buttonText'      => __( 'Select Date' ),
                    "dateFormat" => "dd/mm/yy",
					'numberOfMonths'  => 1,
					'showButtonPanel' => true,
				),
				'inline' => true,
			)
		),
        
	);
	return $meta_boxes;
}

and placed in my shortcode:

    $options = array(
				'post_type' => $post_type,
				'product_cat' => $product_cat,
				'posts_per_page' => $posts_per_page,
                'meta_key' => 'day_event',
                'orderby' => 'meta_value',
                'order' => 'ASC',
            
    );

How can I do that reorder by date?
thank you!