diff --git a/gnu/packages/base.scm b/gnu/packages/base.scm
index 9aa69cfe77..5733edb8da 100644
--- a/gnu/packages/base.scm
+++ b/gnu/packages/base.scm
@@ -1244,7 +1244,7 @@ (define-public glibc/hurd-headers
 (define-public tzdata
   (package
     (name "tzdata")
-    (version "2020f")
+    (version "2021a")
     (source (origin
              (method url-fetch)
              (uri (string-append
@@ -1252,7 +1252,7 @@ (define-public tzdata
                    version ".tar.gz"))
              (sha256
               (base32
-               "10b8cr55x6ji14n3kqkn3avj1s9b79b8gszh81fxrrisij8k248j"))))
+               "022fn6gkmp7pamlgab04x0dm5hnyn2m2fcnyr3pvm36612xd5rrr"))))
     (build-system gnu-build-system)
     (arguments
      `(#:tests? #f
@@ -1312,7 +1312,7 @@ (define-public tzdata
                                 version ".tar.gz"))
                           (sha256
                            (base32
-                            "1i998crd9fxdfhv4jd241j1arx0ng7j7cvczpmj4y5j5fwmfmvng"))))))
+                            "1l02b0jiwp3fl0xd6227i69d26rmx3yrnq0ssq9vvdmm4jhvyipb"))))))
     (home-page "https://www.iana.org/time-zones")
     (synopsis "Database of current and historical time zones")
     (description "The Time Zone Database (often called tz or zoneinfo)