diff --git a/doc/builtin.jax b/doc/builtin.jax
index ad433ef82..1f423d17c 100644
--- a/doc/builtin.jax
+++ b/doc/builtin.jax
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim バージョン 9.1.  Last change: 2025 Aug 24
+*builtin.txt*	For Vim バージョン 9.1.  Last change: 2025 Sep 02
 
 
 		VIMリファレンスマニュアル    by Bram Moolenaar
diff --git a/en/builtin.txt b/en/builtin.txt
index 418bc47e5..40e6d93eb 100644
--- a/en/builtin.txt
+++ b/en/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2025 Aug 24
+*builtin.txt*	For Vim version 9.1.  Last change: 2025 Sep 02
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar