diff --git a/reference/datetime/functions/strftime.xml b/reference/datetime/functions/strftime.xml
index eb085c9756..0a7547f612 100644
--- a/reference/datetime/functions/strftime.xml
+++ b/reference/datetime/functions/strftime.xml
@@ -644,6 +644,7 @@ Unknown format : 'v'
   &reftitle.seealso;
   <para>
    <simplelist>
+    <member><link xlink:href="&url.strftime.format.designer;">Online strftime() format design tool</link></member>
     <member><function>setlocale</function></member>
     <member><function>mktime</function></member>
     <member><function>strptime</function></member>