diff --git a/doc/3RDPARTY b/doc/3RDPARTY
index 7947ad06cfee..94b320eba829 100644
--- a/doc/3RDPARTY
+++ b/doc/3RDPARTY
@@ -1,4 +1,4 @@
-#	$NetBSD: 3RDPARTY,v 1.1717 2020/05/24 19:49:34 christos Exp $
+#	$NetBSD: 3RDPARTY,v 1.1718 2020/05/25 14:54:26 christos Exp $
 #
 # This file contains a list of the software that has been integrated into
 # NetBSD where we are not the primary maintainer.
@@ -1395,14 +1395,14 @@ Notes:
 Added changes from a5 -> a12 manually.
 
 Package:	tz
-Version:	tzcode2019b / tzdata2020a
+Version:	tzcode2020a / tzdata2020a
 Current Vers:	tzcode2020a / tzdata2020a
 Maintainer:	Paul Eggert <eggert@cs.ucla.edu>
 Archive Site:	ftp://ftp.iana.org/tz/releases/
 Archive Site:	ftp://munnari.oz.au/pub/oldtz/
 Old Archive Site:	ftp://elsie.nci.nih.gov/pub/
 Home Page:	http://www.iana.org/time-zones
-Date:		2019-07-03
+Date:		2020-05-25
 Mailing List:	tz@iana.org
 Responsible:	kleink, christos, kre
 License:	Public domain
diff --git a/doc/CHANGES b/doc/CHANGES
index 291073e54fdb..a540ab074fd9 100644
--- a/doc/CHANGES
+++ b/doc/CHANGES
@@ -1,4 +1,4 @@
-# LIST OF CHANGES FROM LAST RELEASE:			<$Revision: 1.2692 $>
+# LIST OF CHANGES FROM LAST RELEASE:			<$Revision: 1.2693 $>
 #
 #
 # [Note: This file does not mention every change made to the NetBSD source tree.
@@ -210,3 +210,4 @@ Changes from NetBSD 9.0 to NetBSD 10.0:
 		generator device [riastradh 20200517]
 	libuv: Import version 1.38.0. [christos 20200524]
 	bind: Import version 9.16.3. [christos 20200524]
+	tzcode: Updated to 2020a. [christos 20200525]