diff --git a/extra/tzdata/checksums b/extra/tzdata/checksums
index 61b29724..bb1e6b64 100644
--- a/extra/tzdata/checksums
+++ b/extra/tzdata/checksums
@@ -1 +1 @@
-b8d449925e7883cbeb656fd660737cc5dcc7689f961b0b44c65d6644baf1a21a  2019a.tar.gz
+e51485f59c96a2a31170ac0700d0b76c8627ca00fa4040987352ca44cdd0887b  2019b.tar.gz
diff --git a/extra/tzdata/sources b/extra/tzdata/sources
index dd6c46eb..574b889b 100644
--- a/extra/tzdata/sources
+++ b/extra/tzdata/sources
@@ -1 +1 @@
-https://github.com/eggert/tz/archive/2019a.tar.gz
+https://github.com/eggert/tz/archive/2019b.tar.gz
diff --git a/extra/tzdata/version b/extra/tzdata/version
index 7a4ca88e..a68a5648 100644
--- a/extra/tzdata/version
+++ b/extra/tzdata/version
@@ -1 +1 @@
-2019a 1
+2019b 1