tag order question

Is there a way to specify that one tag should display in order of the date the book was added, but have the rest display normally? Use this code – it worked.function custom_mbt_pre_get_posts($query) {    if($query->is_tax(‘mbt_tag’) and $query->get(‘mbt_tag’) == ‘TAG SLUG GOES HERE’) {        $query->set(‘orderby’, ‘post_date’);        $query->set(‘order’, ‘ASC’);    }}add_action(‘pre_get_posts’, ‘custom_mbt_pre_get_posts’, 50);