diff --git a/doc/Guidebook.txt b/doc/Guidebook.txt
index d1927889d..562f8ac05 100644
--- a/doc/Guidebook.txt
+++ b/doc/Guidebook.txt
@@ -6041,8 +6041,8 @@
                NetHack 3.6.4 was released on December 18, 2019 containing a
           security fix and a few bug fixes.
 
-               NetHack 3.6.5 was released in January, 2020 containing  some
-          security fixes and a small number of bug fixes.
+               NetHack 3.6.5 was released on January  27,  2020  containing
+          some security fixes and a small number of bug fixes.
 
                The official NetHack web site is maintained by Ken Lorber at
           https://www.nethack.org/.