diff --git a/pkgs/data/misc/tzdata/default.nix b/pkgs/data/misc/tzdata/default.nix
index 843055a2c45..ef2bae8dbaf 100644
--- a/pkgs/data/misc/tzdata/default.nix
+++ b/pkgs/data/misc/tzdata/default.nix
@@ -2,16 +2,16 @@
 
 stdenv.mkDerivation rec {
   name = "tzdata-${version}";
-  version = "2016j";
+  version = "2017c";
 
   srcs =
     [ (fetchurl {
         url = "http://www.iana.org/time-zones/repository/releases/tzdata${version}.tar.gz";
-        sha256 = "1j4xycpwhs57qnkcxwh3np8wnf3km69n3cf4w6p2yv2z247lxvpm";
+        sha256 = "02yrrfj0p7ar885ja41ylijzbr8wc6kz6kzlw8c670i9m693ym6n";
       })
       (fetchurl {
         url = "http://www.iana.org/time-zones/repository/releases/tzcode${version}.tar.gz";
-        sha256 = "1dxhrk4z0n2di8p0yd6q00pa6bwyz5xqbrfbasiz8785ni7zrvxr";
+        sha256 = "1dvrq0b2hz7cjqdyd7x21wpy4qcng3rvysr61ij0c2g64fyb9s41";
       })
     ];