diff --git a/dat/history b/dat/history
index 5c9f44a8e..5d1943614 100644
--- a/dat/history
+++ b/dat/history
@@ -226,7 +226,7 @@ fixes to NetHack 3.6.2.
 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
+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
diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index dace17425..0a5af7469 100644
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -5238,7 +5238,7 @@ fixes to NetHack 3.6.2.
 NetHack 3.6.4 was released on December 18, 2019 containing a security fix
 and a few bug fixes.
 .pg
-NetHack 3.6.5 was released in January, 2020 containing some security fixes
+NetHack 3.6.5 was released on January 27, 2020 containing some security fixes
 and a small number of bug fixes.
 .pg
 The official NetHack web site is maintained by \fBKen Lorber\fP
diff --git a/doc/Guidebook.tex b/doc/Guidebook.tex
index f81348abe..7760385e7 100644
--- a/doc/Guidebook.tex
+++ b/doc/Guidebook.tex
@@ -5850,7 +5850,7 @@ a few bug fixes.
 
 %.pg
 \medskip
-NetHack 3.6.5 was released in January, 2020 containing some security fixes
+NetHack 3.6.5 was released on January 27, 2020 containing some security fixes
 and a small number of bug fixes.
 
 %.pg
diff --git a/include/patchlevel.h b/include/patchlevel.h
index 51d8a6a14..7a18a4699 100644
--- a/include/patchlevel.h
+++ b/include/patchlevel.h
@@ -44,7 +44,7 @@
 /****************************************************************************/
 /* Version 3.6.x */
 
-/*  Patch 5, January ??, 2020
+/*  Patch 5, January 27, 2020
  *
  *  fix accessing mons[-1] when trying to gate in a non-valid demon
  *  fix accessing mons[-1] when monster figures out if a tin cures stoning
@@ -57,6 +57,7 @@
  *  use vsnprintf instead of vsprintf in pline.c where possible
  *  Windows: incldues a fix from a 3.6.4 post-release update where 
  *      OPTIONS=map_mode:fit_to_screen could cause a game start failure
+ *  Windows: users with C-locale unmappable names could get game start failure
  */
 
 /*  Patch 4, December 18, 2019