diff --git a/.gitignore b/.gitignore
index 6807054..af0f830 100644
--- a/.gitignore
+++ b/.gitignore
@@ -184,3 +184,5 @@ noarch/
 /tzdata2020f.tar.gz
 /tzcode2021a.tar.gz
 /tzdata2021a.tar.gz
+/tzcode2021c.tar.gz
+/tzdata2021c.tar.gz
diff --git a/sources b/sources
index c532355..cadbc5d 100644
--- a/sources
+++ b/sources
@@ -1,4 +1,4 @@
 SHA512 (javazic.tar.gz) = c23a4a437a87d0792f23e98025520a11273fc3d12ef5dcf64af8332ed60ba9ce77eaadfd234cee92b3ca9dc08b9e4123e804745925d68ddbd0b2e1e9039e526b
 SHA512 (javazic-1.8-37392f2f5d59.tar.xz) = 2ba718dfeed53a3bd6b44e3dfe96338a609e482e4e6d942e2a7e622fc6c52606cb323ac3a59739c463e34f70fff217c0a61f5b3d3c4958eff2801b1504ee4204
-SHA512 (tzcode2021a.tar.gz) = bf1d53bcbfecd3b09d57a9e6d3cb49b5dc5f8e1b6674b67e7f974e1a268c2aaf13ca89a7ef12f49d0665aff782bd72685e00c22a41ca88a028da0429f972fd45
-SHA512 (tzdata2021a.tar.gz) = 7cdd762ec90ce12a30fa36b1d66d1ea82d9fa21e514e2b9c7fcbe2541514ee0fadf30843ff352c65512fb270857b51d1517b45e1232b89c6f954ba9ff1833bb3
+SHA512 (tzcode2021c.tar.gz) = 9ed7677744058c58656b47d77d464bad6ef503f2892b53c6abe694e68e73fa123dfc5c11bbcbbb7798f0a6bf1da72b81f8f1c63670839b967e15e58d6d36adad
+SHA512 (tzdata2021c.tar.gz) = e8de3a17c38f530b2ec39605699742dd32da5ee92ecf64accaaa5b012a1dac51d1f594adc52660602c3425016520346ab6ad614fa475eb310e17ccdcae93e6ca
diff --git a/tzdata.spec b/tzdata.spec
index 8df30bb..bf50b8d 100644
--- a/tzdata.spec
+++ b/tzdata.spec
@@ -1,9 +1,9 @@
 Summary: Timezone data
 Name: tzdata
-Version: 2021a
-%define tzdata_version 2021a
-%define tzcode_version 2021a
-Release: 3%{?dist}
+Version: 2021c
+%define tzdata_version 2021c
+%define tzcode_version 2021c
+Release: 1%{?dist}
 License: Public Domain
 URL: https://www.iana.org/time-zones
 Source0: ftp://ftp.iana.org/tz/releases/tzdata%{tzdata_version}.tar.gz
@@ -151,6 +151,27 @@ install -p -m 644 tzdb.dat $RPM_BUILD_ROOT%{_datadir}/javazi-1.8/
 %{_datadir}/javazi-1.8
 
 %changelog
+* Thu Oct 07 2021 Patsy Griffin <patsy@redhat.com> - 2021c-1
+- Rebase to tzdata-2021c - supersedes tzdata-2021b
+  - Revert most of 2021b changes to 'backward'.
+  - Fix 'zic -b fat' bug in pre-1970 32-bit data.
+  - Fix two Link line typos.
+  - Distribute SECURITY file.
+  - Includes changes in tzdata-2021b:
+  - Jordan now starts DST on February's last Thursday.
+  - Samoa no longer observes DST.
+  - Merge more location-based Zones whose timestamps agree since 1970.
+  - Move some backward-compatibility links to 'backward'.
+  - Rename Pacific/Enderbury to Pacific/Kanton.
+  - Correct many pre-1993 transitions in Malawi, Portugal, etc.
+  - zic now creates each output file or link atomically.
+  - zic -L no longer omits the POSIX TZ string in its output.
+  - zic fixes for truncation and leap second table expiration.
+  - zic now follows POSIX for TZ strings using all-year DST.
+  - Fix some localtime crashes and bugs in obscure cases.
+  - zdump -v now outputs more-useful boundary cases.
+  - tzfile.5 better matches a draft successor to RFC 8536.
+
 * Tue Aug 10 2021 Mohan Boddu <mboddu@redhat.com> - 2021a-3
 - Rebuilt for IMA sigs, glibc 2.34, aarch64 flags
   Related: rhbz#1991688