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Release Management
Anas Nashif edited this page Feb 19, 2025
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Please see https://docs.zephyrproject.org/latest/project/release_process.html#release-milestones and https://docs.zephyrproject.org/latest/releases/ for the definition of the release process and release checkpoints and milestones.
| Release Version | Release Date | Current Version | Support Level | Maintainer |
|---|---|---|---|---|
| 4.1 | Mar 2025 | 8 Months (11/2025) | Benjamin / Fabio | |
| 4.0 | Nov 2024 | 4.0.0 | 8 Months (7/2025) | Dan / Mahesh |
| 3.7 | Jul 2024 | 3.7.1 | LTS (7/2029) | Anas / Alberto |
| 3.6 | Feb 2024 | 3.6.0 | EOL | Brix / Maureen |
| 3.5 | Oct 2023 | 3.5.0 | EOL | Johan / Fabio |
| 3.4 | Jun 2023 | 3.4.0 | EOL | Anas / Josh |
| 3.3 | Feb 2023 | 3.3.0 | EOL | Stephanos / Lauren |
| 3.2 | Sep 2022 | 3.2.0 | EOL | Fabio / Mahesh |
| 3.1 | Jun 2022 | 3.1.0 | EOL | Carles / Marti |
| 3.0 | Feb 2022 | 3.0.0 | EOL | Dan |
| 2.7 | Oct 2021 | 2.7.6 | EOL | Chris / Anas |
| 2.6 | Jun 2021 | 2.6.0 | EOL | Kumar |
| 2.5 | Feb 2021 | 2.5.0 | EOL | Anas |
| 2.4 | Sep 2020 | 2.4.0 | EOL | Maureen |
| 2.3 | Jun 2020 | 2.3.0 | EOL | Carles |
| 2.2 | Feb 2020 | 2.2.0 | EOL | Johan |
| 2.1 | Dec 2019 | 2.1.0 | EOL | David |
| 2.0 | Sep 2019 | 2.0.0 | EOL | Ioannis |
| 1.14 | Apr 2019 | 1.14.3 | EOL | Kumar |
| 1.13 | Sep 2018 | 1.13.0 | EOL | Anas |
| Milestone | 3.7 (LTS) | 4.0 | 4.1 | 4.2 | 4.3 |
|---|---|---|---|---|---|
| Planning | 2024/01/12 | 2024/06/26 | |||
| Review target milestones | 2024/05/10 | 2024/10/11 | 2025/01/31 | ||
| Release and Timeline Announcement | 2024/05/31 | 2024/10/18 | 2025/02/07 | ||
| Feature Freeze (RC1) | 2024/06/14 | 2024/10/25 | 2025/02/14 | ||
| 2nd Release Candidate (RC2) | 2024/06/28 | 2024/11/01 | 2025/02/21 | ||
| Hard Freeze (RC3) | 2024/07/12 | 2024/11/08 | 2025/02/28 | ||
| Release | 2024/07/26 | 2024/11/15 | 2025/03/07 | 2025/07/18 | 2025/11/14 |
| End Of Life | 2027/01/26 | 2025/07/18 |
| Milestone | 3.1 | 3.2 | 3.3 | 3.4 | 3.5 | 3.6 |
|---|---|---|---|---|---|---|
| Planning | 2022/04/27 | 2022/08/26 | 2023/02/01 | 2023/05/20 | 2023/09/22 | |
| Review target milestones | 2022/08/12 | 2022/12/16 | 2023/05/05 | 2023/09/08 | 2024/01/05 | |
| Release and Timeline Announcement | 2022/05/06 | 2022/09/02 | 2023/01/06 | 2023/05/19 | 2023/09/15 | 2024/01/19 |
| Feature Freeze (RC1) | 2022/05/16 | 2022/09/09 | 2023/01/27 | 2023/05/26 | 2023/09/29 | 2024/02/02 |
| 2nd Release Candidate (RC2) | 2022/05/20 | 2022/09/16 | 2023/02/03 | 2023/06/02 | 2023/10/06 | 2024/02/09 |
| Hard Freeze (RC3) | 2022/05/27 | 2022/09/23 | 2023/02/10 | 2023/06/09 | 2023/10/13 | 2024/02/16 |
| Release | 2022/06/03 | 2022/09/30 | 2023/02/17 | 2023/06/16 | 2023/10/20 | 2024/02/23 |
| End Of Life | Ended | Ended | Ended | Ended | Ended | Ended |
Note, as per the TSC F2F of 2019/10/31, releases after and including 2.4 have a 4 month cadence.
The release management team meets weekly to triage bugs and assess release readiness following the below agenda:
- Triage bugs
- Bugs without priority
- Unassigned bugs
- Issues without category
- Review backports
- Review release progress
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