Red Hat Enterprise Linux Timezone Data (tzdata) - Development Status Page

Updated

The tzdata package contains data files with rules for various time zones around the world. This document captures Red Hat engineering's tentative plans, progress and status as upstream tzdata releases are packaged and released to Red Hat's customers and partners in Red Hat Enterprise Linux asynchronous errata.

All dates are approximate and subject to change.

Red Hat plans to release all tzdata updates, subject to testing and qualification and aims to do so promptly after each upstream release. In general, integration and testing of a tzdata update is expected to take a minimum of 5 business days prior to releasing the update to our customers and partners. Red Hat aims to minimize this time. Where identified, Red Hat will handle tzdata regressions and other major defects on a case-by-case basis.

Disclaimer: Links contained herein to external website(s) are provided for convenience only. Red Hat has not reviewed the links and is not responsible for the content or its availability. The inclusion of any link to an external website does not imply endorsement by Red Hat of the website or their entities, products or services. You agree that Red Hat is not responsible or liable for any loss or expenses that may result due to your use of (or reliance on) the external site or content.

tzdata-2026a:

  • announced upstream on 20260302 Content from lists.iana.org is not included.see announcement here
    • released by Red Hat in Red Hat Enterprise Linux advisory RHBA-2026:4834 on 20260318 for supported releases of Red Hat Enterprise Linux 6
    • released by Red Hat in Red Hat Enterprise Linux advisory RHBA-2026:4833 on 20260318 for supported releases of Red Hat Enterprise Linux 7
    • released by Red Hat in Red Hat Enterprise Linux advisory RHBA-2026:4902 on 20260318 for supported releases of Red Hat Enterprise Linux 8, 9 and 10
    • This is the first tzdata release with two package variants for RHEL 9 and RHEL 10. The system package manager will automatically install the appropriate variant.

tzdata-2025c:

tzdata-2025b:

tzdata-2025a:

tzdata-2024b:
NOTE: This is an optional update that incorporates several non-urgent changes to code and data. It does NOT contain any urgent timezone changes.

tzdata-2024a:

tzdata-2023d:

tzdata-2023c:

tzdata-2023b:

tzdata-2022g:

tzdata-2022f:

tzdata-2022e:

tzdata-2022d:

tzdata-2022c:

tzdata-2022a:

tzdata-2021e:

tzdata-2021c:

tzdata-2021b:

tzdata-2021a:

tzdata-2020f:

tzdata-2020e:

tzdata-2020d:

tzdata-2020c:

tzdata-2020b:

  • Announced upstream on 20201007 Content from mm.icann.org is not included.see announcement here
  • This update removed some files that had previously been considered obsolete. Removal of pacificnew was reported to break the java TZupdater tool. On 20201012, the upstream project released a patch to fix this temporarily to prevent TZupdater from breaking. In a future update, this patch will be removed and the obsolete pacificnew file will be removed.
  • Additionally, the POSIXRULES macro no longer creates the posixrules file by default. In order to provide continued support for this file, we have provided a patch to initialize the macro so that it will continue to create the posixrules file. This patch may be removed in a future update. The posixrules file should be considered obsolete.
    • released by Red Hat in Red Hat Enterprise Linux advisory RHBA-2020:4282-05 on 20201019 for supported releases of Red Hat Enterprise Linux 5, 6, 7 and 8

tzdata-2020a:

tzdata-2019c:

tzdata-2019b:

tzdata-2019a:

tzdata-2018i:

tzdata-2018h:

tzdata-2018g:

tzdata-2018f:

tzdata-2018e:
This release of tzdata 2018e is providing the "rearguard" data set for maximum compatibility with existing Red Hat Enterprise Linux installs. Future releases of Red Hat Enterprise Linux will be transitioning to the default or "vanguard" tzdata data set.

The "rearguard" and "vanguard" data sets are defined by the upstream tzdata project and represent approximately the same data, with "vanguard" optimized for newer time zone data tooling, and "rearguard" optimized for compatibility with existing tooling. For example "vanguard" implements support for negative DST offsets, while "rearguard" supports the traditional format.

tzdata-2018d:

tzdata-2018c:

tzdata-2018b:
This update was made available for testing but never officially announced. The update made changes to timezone offsets which applications were not prepared to process. A change has been proposed for tzdata-2018c that increases backward compatibility. As soon as an update is available we will begin working on it immediately. We do not plan to ship tzata-2018b.

tzdata-2018a:
This update was made available for testing but never officially announced due to a missing data file. This has been fixed in tzdata-2018b. We do not plan to ship tzdata-2018a due to the missing file.

tzdata-2017c:

tzdata-2017b:

tzdata-2017a:

tzdata-2016j:

tzdata-2016i:

tzdata-2016h:

tzdata-2016g:

tzdata-2016f:

tzdata-2016e:

tzdata-2016d:

tzdata-2016c:

tzdata-2016b:

tzdata-2016a:

tzdata-2015g:

tzdata-2015f:

tzdata-2015e:

tzdata-2015d:

tzdata-2015c:

tzdata-2015b:

tzdata-2015a:

tzdata-2014j:

tzdata-2014i:

tzdata-2014h:

tzdata-2014g:

tzdata-2014f:

tzdata-2014e:

  • released in Red Hat Enterprise Linux advisory RHEA-2014:0774 on 20140620 for supported releases of Red Hat Enterprise Linux 4, 5, 6 and 7

tzdata-2014d:

  • released in Red Hat Enterprise Linux advisory RHEA-2014:0592 on 20140602 for supported releases of Red Hat Enterprise Linux 4, 5 and 6
  • released in Red Hat Enterprise Linux advisory RHEA-2014:0737 on 20140610 for supported releases of Red Hat Enterprise Linux 7
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