diff --git a/doc/go1.13.html b/doc/go1.13.html
index 220f34f31d..97f2448c10 100644
--- a/doc/go1.13.html
+++ b/doc/go1.13.html
@@ -20,7 +20,7 @@ Do not send CLs removing the interior tags from such phrases.
 <p>
   <strong>
     Go 1.13 is not yet released. These are work-in-progress
-    release notes. Go 1.13 is expected to be released in August 2019.
+    release notes. Go 1.13 is expected to be released in September 2019.
   </strong>
 </p>