diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index a7593c4d0..5562490a2 100644
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -35,7 +35,7 @@
 .ds vr "NetHack 3.7
 .ds f0 "\*(vr
 .ds f1
-.ds f2 "March 8, 2020
+.ds f2 "June 20, 2020
 .
 .\" A note on some special characters:
 .\" \(lq = left double quote
diff --git a/doc/Guidebook.tex b/doc/Guidebook.tex
index 759441161..83e15d617 100644
--- a/doc/Guidebook.tex
+++ b/doc/Guidebook.tex
@@ -45,7 +45,7 @@
 %.au
 \author{Original version - Eric S. Raymond\\
 (Edited and expanded for 3.7 by Mike Stephenson and others)}
-\date{March 8, 2020}
+\date{June 20, 2020}
 
 \maketitle