diff --git a/pkgs/by-name/tz/tzdata/package.nix b/pkgs/by-name/tz/tzdata/package.nix
index ad04029c4b80..75cb3cc49134 100644
--- a/pkgs/by-name/tz/tzdata/package.nix
+++ b/pkgs/by-name/tz/tzdata/package.nix
@@ -8,16 +8,16 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "tzdata";
-  version = "2026b";
+  version = "2026c";
 
   srcs = [
     (fetchurl {
       url = "https://data.iana.org/time-zones/releases/tzdata${finalAttrs.version}.tar.gz";
-      hash = "sha256-EUVD2fGaa/61vKQ2hq6hc9OHVaPbHy7sESZHrpLG9UQ=";
+      hash = "sha256-5KF4pEd/PQ6nfMMYKP9yqjj+/41hqhPn6Z4ULp2QK+Q=";
     })
     (fetchurl {
       url = "https://data.iana.org/time-zones/releases/tzcode${finalAttrs.version}.tar.gz";
-      hash = "sha256-N+nthCf101IcIvxY4pPL+wQ9cO7fEAOHCzPzY/Yco0Q=";
+      hash = "sha256-sc/8Os5MTHzQ77ovet2G7D0LedpIvPA1gmcf08j+rOg=";
     })
   ];