add_action( 'private_to_published', 'wpmu_update_blogs_date' );
add_action( 'publish_phone', 'wpmu_update_blogs_date' );
add_action( 'publish_post', 'wpmu_update_blogs_date' );
add_action( 'private_to_published', 'wpmu_update_blogs_date' );
add_action( 'publish_phone', 'wpmu_update_blogs_date' );
add_action( 'publish_post', 'wpmu_update_blogs_date' );