//Query News posts
add_filter('query_vars', 'add_my_queryvars' );
function add_my_queryvars ( $qvars ){
    $qvars[] = ‘newsdate’;
  return $qvars;
}

//Call the news template
add_filter('template_include', 'set_my_template');
function set_my_template( $template ){
    global $wp_query;
    if( isset( $wp_query->query_vars['newsdate'] )) {
        $template = locate_template( 'page-all-news.php');
    }
    return $template;
}

add_filter('posts_where', 'my_reviews_where' );
function my_reviews_where( $where ){
    global $wp_query, $wpdb;
    if( isset( $wp_query->query_vars['newsdate'] )) {
        $author = $wp_query->query_vars['newsdate'];
        $where .= " AND m.meta_key = 'post_date'";
    }
    return $where;
}

add_action('generate_rewrite_rules', 'my_rewrite_rules');
function my_rewrite_rules( $wp_rewrite ) {
  $new_rules = array(
     'news/(.+)' => 'index.php?newsdate=' .
       $wp_rewrite->preg_index(1),
       );

  // Add the new rewrite rule into the top of the global rules array
  $wp_rewrite->rules = $new_rules + $wp_rewrite->rules;
}