diff --git a/gnu/packages/base.scm b/gnu/packages/base.scm
index 1c01874bb0..2dd17a9ebb 100644
--- a/gnu/packages/base.scm
+++ b/gnu/packages/base.scm
@@ -939,15 +939,15 @@ command.")
 (define-public tzdata
   (package
     (name "tzdata")
-    (version "2016g")
+    (version "2016j")
     (source (origin
              (method url-fetch)
              (uri (string-append
-                   "http://www.iana.org/time-zones/repository/releases/tzdata"
+                   "https://www.iana.org/time-zones/repository/releases/tzdata"
                    version ".tar.gz"))
              (sha256
               (base32
-               "1lgbh49bsbysibzr7imjsh1xa7pqmimphxvvwh6kncj7pjr3fw9w"))))
+               "1j4xycpwhs57qnkcxwh3np8wnf3km69n3cf4w6p2yv2z247lxvpm"))))
     (build-system gnu-build-system)
     (arguments
      '(#:tests? #f
@@ -995,8 +995,8 @@ command.")
                                 version ".tar.gz"))
                           (sha256
                            (base32
-                            "0azsz436vd65bkdkdmjgsh7zhh0whnqqfliva45191krmm3hpy8z"))))))
-    (home-page "http://www.iana.org/time-zones")
+                            "1dxhrk4z0n2di8p0yd6q00pa6bwyz5xqbrfbasiz8785ni7zrvxr"))))))
+    (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)
 contains code and data that represent the history of local time for many