diff --git a/extra/tzdata/checksums b/extra/tzdata/checksums
index bb1e6b64..dbdca45e 100644
--- a/extra/tzdata/checksums
+++ b/extra/tzdata/checksums
@@ -1 +1 @@
-e51485f59c96a2a31170ac0700d0b76c8627ca00fa4040987352ca44cdd0887b  2019b.tar.gz
+38b1f7c7a050daa14fb07f6b72cdde1fc895fece40758d4d55736847041ad9e2  2019c.tar.gz
diff --git a/extra/tzdata/sources b/extra/tzdata/sources
index 574b889b..f809f894 100644
--- a/extra/tzdata/sources
+++ b/extra/tzdata/sources
@@ -1 +1 @@
-https://github.com/eggert/tz/archive/2019b.tar.gz
+https://github.com/eggert/tz/archive/2019c.tar.gz
diff --git a/extra/tzdata/version b/extra/tzdata/version
index a68a5648..6e4135ec 100644
--- a/extra/tzdata/version
+++ b/extra/tzdata/version
@@ -1 +1 @@
-2019b 1
+2019c 1