diff --git a/ChangeLog b/ChangeLog
index d2a37799..344f0bce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -21751,3 +21751,5 @@
 2021-06-01 Fred Gleason <fredg@paravelsystems.com>
 	* Fixed a regression that caused the application menu layout to
 	be corrupted in the DEB packages.
+2021-06-01 Fred Gleason <fredg@paravelsystems.com>
+	* Cleaned up 'invalid date format' warnings from dpkg-buildpkg(1).
diff --git a/autogen.sh b/autogen.sh
index 584805e4..13d506e5 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -23,7 +23,7 @@
 #
 # Generate Debian packaging metadata
 #
-DATESTAMP=`date +%a,\ %d\ %B\ %Y\ %T\ %z`
+DATESTAMP=`date +%a,\ %d\ %b\ %Y\ %T\ %z`
 sed s/@VERSION@/`cat PACKAGE_VERSION`/ < debian/control.src > debian/control
 sed s/@VERSION@/`cat PACKAGE_VERSION`/ < debian/changelog.src | sed "s/@DATESTAMP@/$DATESTAMP/" > debian/changelog