diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index 22256c17c..314567f71 100644
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -60,7 +60,7 @@
 .ds f0 \*(vr
 .ds f1 \" empty
 .\"DO NOT REMOVE NH_DATESUB .ds f2 Date(%B %-d, %Y)
-.ds f2 February 11, 2026
+.ds f2 March 21, 2026
 .
 .\" A note on some special characters:
 .\" \(lq = left double quote
diff --git a/doc/Guidebook.tex b/doc/Guidebook.tex
index be5da967b..7fa1724af 100644
--- a/doc/Guidebook.tex
+++ b/doc/Guidebook.tex
@@ -25,7 +25,7 @@
 \author{Original version - Eric S. Raymond\\
 (Edited and expanded for 3.7.0 by Mike Stephenson and others)}
 %DO NOT REMOVE NH_DATESUB \date{Date(%B %-d, %Y)}
-\date{February 11, 2026}
+\date{March 21, 2026}
 
 \maketitle