Ticket #34034: 34034.diff

src/wp-admin/includes/meta-boxes.php

@@ -230 +230 @@
  * @param WP_Post $post WP_Post object for the current post.
  */
 do_action( 'post_submitbox_misc_actions', $post );
+
+if ( 'post' !== $post_type )  {
+        /**
+         * Fires after the post time/date setting in the Publish meta box on non-post post types.
+         *
+         * @since 4.4.0
+         *
+         * @param WP_Post $post WP_Post object for the current post.
+         */
+        do_action( $post_type . '_submitbox_misc_actions', $post );
+}
 ?>
 </div>
 <div class="clear"></div>