diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index dddc1c391..cdf633630 100644
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -4,7 +4,7 @@
 .ds vr "NetHack 3.4
 .ds f0 "\*(vr
 .ds f1
-.ds f2 "March 18, 2002
+.ds f2 "March 20, 2002
 .mt
 A Guide to the Mazes of Menace
 (Guidebook for NetHack)
diff --git a/doc/Guidebook.tex b/doc/Guidebook.tex
index 7b13f714d..0729c623d 100644
--- a/doc/Guidebook.tex
+++ b/doc/Guidebook.tex
@@ -39,7 +39,7 @@
 %.au
 \author{Eric S. Raymond\\
 (Extensively edited and expanded for 3.4)}
-\date{March 18, 2002}
+\date{March 20, 2002}
 
 \maketitle