diff --git a/input_data/android/countryzones.txt b/input_data/android/countryzones.txt
index 18b8df9..dca44eb 100644
--- a/input_data/android/countryzones.txt
+++ b/input_data/android/countryzones.txt
@@ -25,7 +25,7 @@
 # a time zone for an Android device.
 
 # ianaVersion: The version of the IANA rules this file matches.
-ianaVersion:"2018c"
+ianaVersion:"2018d"
 
 # countries:
 #
@@ -179,7 +179,7 @@
   >
 
   timeZoneMappings:<
-    utcOffset:"11:00"
+    utcOffset:"08:00"
     id:"Antarctica/Casey"
   >
 
diff --git a/input_data/iana/tzdata2018c.tar.gz b/input_data/iana/tzdata2018c.tar.gz
deleted file mode 100644
index 8f3c500..0000000
--- a/input_data/iana/tzdata2018c.tar.gz
+++ /dev/null
Binary files differ
diff --git a/input_data/iana/tzdata2018c.tar.gz.asc b/input_data/iana/tzdata2018c.tar.gz.asc
deleted file mode 100644
index 4501d12..0000000
--- a/input_data/iana/tzdata2018c.tar.gz.asc
+++ /dev/null
@@ -1,17 +0,0 @@
------BEGIN PGP SIGNATURE-----
-Version: GnuPG v1
-
-iQIcBAABAgAGBQJaZuAMAAoJEO2X6Q5iqn40WkcP/3/QD5VP4YT5/zLPqTE4hLMB
-iuNFJelf1Iv4hFXYCMhfnU+0MlUfvSBBKLI5uu1vTl48ms33Ku+CL6fKI8uIlwMG
-v0yTCOxRozMofUcjsm2IfGRlJgAajMPWDOGsD3jocX0Vf14m9siycy4xdBk7vNrs
-QUKL3zl0XOBQY51ivnYvEK/f8LJZzn7NHizL0VwI0rxO/Oj6o0Q2wWkE61tBS27r
-znn9lFRWH1Nh+TJ7Yh1mNAd4UOYGL9Q3eoWkl5MzPM3ujjVSdsEXhNLGemPrfE50
-RzuvsLgiKqahBpC9Zxy39pqiO+riRKHLlNjxNcCeHw6M5w8/FuBwwozSmdchWaZn
-gD50k7az4F5nojUgzYTNGV6nW2CGflLLgOeUWMmYUyF999KpOJzLXNFqMuBYqOOu
-ODI7CJweT0/Ff9jjoKMSqg1rMMDEox/E127ms8uf6qGyjWvp0AQlA5O06bStfpjH
-HDJog9BcDXb64oiJsIg0K4UqqF1n7jMqiufhz4WhrqPqaTP9qJuorSn5yar/UsGc
-V2l2C+BdJhmsvQ9vkLrYJNWXks+oQSFJ1dYYpv+zp/MsiBV1/pKaYEXgurRfQBCW
-eHO57ovm2Pf59dghTnm7SyoiZeqCK/89MWxpX4YbDgzP4ZyBhS2g1/bk7toPajUa
-idAZsIgmZDmw77UHpPJu
-=nVJg
------END PGP SIGNATURE-----
diff --git a/input_data/iana/tzdata2018d.tar.gz b/input_data/iana/tzdata2018d.tar.gz
new file mode 100644
index 0000000..f050229
--- /dev/null
+++ b/input_data/iana/tzdata2018d.tar.gz
Binary files differ
diff --git a/input_data/iana/tzdata2018d.tar.gz.asc b/input_data/iana/tzdata2018d.tar.gz.asc
new file mode 100644
index 0000000..b5e55f6
--- /dev/null
+++ b/input_data/iana/tzdata2018d.tar.gz.asc
@@ -0,0 +1,17 @@
+-----BEGIN PGP SIGNATURE-----
+Version: GnuPG v1
+
+iQIcBAABAgAGBQJas7pNAAoJEO2X6Q5iqn40BqwP/A8PU9mzxssBdQirWsuGhN3E
++3hk6i7UFLrCHixbpN03y7r8ujkhRvkjLSrA2tcrYEK9t8NLkhQIrnmlVjEOQEcz
++qiZWJV55kd2dhk2EE+pc8xXuqRsnId4r/xCF+D2wxl6IZpMEFelRCRiCGgszhDS
+FSv3UjlnpBv3uB5UgKdOFJKYcTvfOZ5jmpt1O6Ma9YNxqlc2+s8hUBR3VEtzancU
++AyCoL/sUrijfGOZPSznhGJJ3lC5LkjkWqC0BYB5EI3YeClVtGWoZlD64jShJhWT
+pe3CAimaEibz1ty1tGz4Agdd0vQErvyCPQY6wy1pRYPW5wb++JomMVub7Uh7w/6o
+pvrkVaVqeiWeENoI6NRnmC+ANSaz6/lF61HM36VZ1XaCgmeCDaLHn31WKHRPctse
+r26++PyCIJwllaTNfGynjkAKUeBJJwwR8a/sjPeqEfEgoDKV1EpQVCBbPna3hmTq
+8nzt11WsTNG+aocYr3hevSYiyxEWOLp5O9UaiTtVDc91Mhk2U9E9Fa7Zva35ZhjJ
+oRPS+AU5GFfWzgiW8XOLURqvwRNqUUudNaXy2wVuzwROdmboyewzB//MBavkI+r+
+raI+coG2ZJoPcQmuRCUcjs1+JnNBL3sZT68/jTy2w0LURfUP9V+dUuJgjtRbMCtb
+Myzq3RCYNI/x3EjU/xcb
+=ibli
+-----END PGP SIGNATURE-----
diff --git a/output_data/android/tzlookup.xml b/output_data/android/tzlookup.xml
index a935d55..dcdbe00 100644
--- a/output_data/android/tzlookup.xml
+++ b/output_data/android/tzlookup.xml
@@ -2,7 +2,7 @@
 
  **** Autogenerated file - DO NOT EDIT ****
 
---><timezones ianaversion="2018c">
+--><timezones ianaversion="2018d">
  <countryzones>
   <country code="ad" default="Europe/Andorra" everutc="n">
    <id>Europe/Andorra</id>
diff --git a/output_data/distro/distro.zip b/output_data/distro/distro.zip
index ca8c3b4..672b90d 100644
--- a/output_data/distro/distro.zip
+++ b/output_data/distro/distro.zip
Binary files differ
diff --git a/output_data/iana/tzdata b/output_data/iana/tzdata
index 89ee097..208963d 100644
--- a/output_data/iana/tzdata
+++ b/output_data/iana/tzdata
Binary files differ
diff --git a/output_data/icu_overlay/icu_tzdata.dat b/output_data/icu_overlay/icu_tzdata.dat
index 0aa66de..753abd9 100644
--- a/output_data/icu_overlay/icu_tzdata.dat
+++ b/output_data/icu_overlay/icu_tzdata.dat
Binary files differ
diff --git a/testing/data/test1/output_data/distro/distro.zip b/testing/data/test1/output_data/distro/distro.zip
index 853e5ee..7913230 100644
--- a/testing/data/test1/output_data/distro/distro.zip
+++ b/testing/data/test1/output_data/distro/distro.zip
Binary files differ
diff --git a/testing/data/test1/output_data/iana/tzdata b/testing/data/test1/output_data/iana/tzdata
index 607b1fd..2e26628 100644
--- a/testing/data/test1/output_data/iana/tzdata
+++ b/testing/data/test1/output_data/iana/tzdata
Binary files differ
diff --git a/testing/data/test1/output_data/icu_overlay/icu_tzdata.dat b/testing/data/test1/output_data/icu_overlay/icu_tzdata.dat
index 1bbf886..4676bca 100644
--- a/testing/data/test1/output_data/icu_overlay/icu_tzdata.dat
+++ b/testing/data/test1/output_data/icu_overlay/icu_tzdata.dat
Binary files differ
diff --git a/testing/data/test2/output_data/distro/distro.zip b/testing/data/test2/output_data/distro/distro.zip
index 259b7ea..628b369 100644
--- a/testing/data/test2/output_data/distro/distro.zip
+++ b/testing/data/test2/output_data/distro/distro.zip
Binary files differ
diff --git a/testing/data/test2/output_data/iana/tzdata b/testing/data/test2/output_data/iana/tzdata
index 9f58164..8440af0 100644
--- a/testing/data/test2/output_data/iana/tzdata
+++ b/testing/data/test2/output_data/iana/tzdata
Binary files differ
diff --git a/testing/data/test2/output_data/icu_overlay/icu_tzdata.dat b/testing/data/test2/output_data/icu_overlay/icu_tzdata.dat
index 6ffd543..8db1e68 100644
--- a/testing/data/test2/output_data/icu_overlay/icu_tzdata.dat
+++ b/testing/data/test2/output_data/icu_overlay/icu_tzdata.dat
Binary files differ