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This page provides key dates for App Engine flexible environment language runtimes as described in the Runtime lifecycle page.
Based on qualification and stability of releases, availability and key dates might be delayed. Revisit this page to stay up to date.
Go Runtime Environment Runtime Version End of support Deprecated Decommissioned Go 1.25 (Preview) Ubuntu 22.041.25 Go 1.24 Ubuntu 22.04 1.24 Go 1.23 Ubuntu 22.04 1.23 Go 1.22 Ubuntu 22.04 1.22 2026-07-28 2027-07-28 Go 1.21 Ubuntu 22.04 1.21 2026-03-03 2027-03-03 Go 1.20 Ubuntu 22.04 1.20 2024-03-27 2025-03-27 Go 1.19 Ubuntu 22.04 1.19 2024-07-10 2025-07-10 Go 1.18 Ubuntu 22.04 1.18 2024-07-10 2025-07-10 Go 1.15 Distroless 1.15 2024-07-10 2025-07-10 Go 1.14 Distroless 1.14 2024-07-10 2025-07-10 Go 1.13 Distroless 1.13 2024-07-10 2025-07-10 Go 1.12 Distroless 1.12 2024-07-10 2025-07-10 Go 1.11 Distroless 1.11 2024-07-10 2025-07-10 Go 1.10 Distroless 1.10 2024-07-10 2025-07-10 Go 1.9 Distroless 1.9 2024-07-10 2025-07-10 Note: Go's release policy states that each major Go release is supported until there are two newer major releases. Key dates might not be available until newer versions of Go are made publicly available. Java Runtime Environment Runtime Version End of support Deprecated Decommission Java 21 Ubuntu 22.04 21 Oct 2031 Java 17 Ubuntu 22.04 17 Oct 2027 Java 11 Ubuntu 18.04 11 2024-10-31 2025-10-31 Java 8 Debian 9 8 2024-07-10 2025-07-10 Node.js Runtime Environment Runtime Version End of support Deprecated Decommission Node.js 24 (Preview only) Ubuntu 24.04 24 Node.js 22 Ubuntu 22.04 22 2027-04-30 2028-04-30 Node.js 20 Ubuntu 22.04 20 2026-04-30 2027-04-30 Node.js 18 Ubuntu 22.04 18 2025-04-30 2026-04-30 Node.js 16 Ubuntu 16.04 16 2024-07-10 2025-07-10 Node.js 14 Ubuntu 16.04 14 2024-07-10 2025-07-10 Node.js 12 Ubuntu 16.04 12 2024-07-10 2025-07-10 Node.js 10 Ubuntu 16.04 10 2024-07-10 2025-07-10 Node.js 8 Ubuntu 16.04 8 2024-07-10 2025-07-10 Python Runtime Environment Runtime Version End of support Deprecated Decommission Python 3.13 Ubuntu 22.04 3.13 2029-10-10 2030-10-10 Python 3.12 Ubuntu 22.04 3.12 2028-10-02 2029-10-02 Python 3.11 Ubuntu 22.04 3.11 2027-10-24 2028-10-24 Python 3.10 Ubuntu 22.04 3.10 2026-10-04 2027-10-04 Python 3.9 Ubuntu 18.04 3.9 2025-10-05 2026-10-05 Python 3.8 Ubuntu 18.04 3.8 2024-10-14 2025-10-14 Python 3.7 Ubuntu 16.04 3.7 2024-07-10 2025-07-10 Python 3.6 Ubuntu 16.04 3.6 2024-07-10 2025-07-10 Python 3.5 Ubuntu 16.04 3.5 2024-07-10 2025-07-10 Python 3.4 Ubuntu 16.04 3.4 2024-07-10 2025-07-10 Python 2.7 Ubuntu 16.04 2 2024-07-10 2025-07-10 PHP Runtime Environment Runtime Version End of support Deprecated Decommission PHP 8.4 Ubuntu 22.04 8.4 2028-12-31 2029-12-31 PHP 8.3 Ubuntu 22.04 8.3 2027-12-31 2028-12-31 PHP 8.2 Ubuntu 22.04 8.2 2026-12-31 2027-12-31 PHP 8.1 Ubuntu 18.04 8.1 2025-12-31 2026-12-31 PHP 7.4 Ubuntu 18.04 7.4 2024-07-10 2025-07-10 PHP 7.3 Ubuntu 16.04 7.3 2024-07-10 2025-07-10 PHP 7.2 Ubuntu 16.04 7.2 2024-07-10 2025-07-10 Ruby Runtime Environment Runtime Version End of support Deprecated Decommission Ruby 3.4 Ubuntu 22.04 3.4 2028-03-31 2029-03-31 Ruby 3.3 Ubuntu 22.04 3.3 2027-03-31 2028-03-31 Ruby 3.2 Ubuntu 22.04 3.2 2026-03-31 2027-03-31 Ruby 3.1 Ubuntu 16.04 3.1 2024-07-10 2025-07-10 Ruby 3.0 Ubuntu 16.04 3.0 2024-07-10 2025-07-10 Ruby 2.7 Ubuntu 16.04 2.7 2024-07-10 2025-07-10 Ruby 2.6 Ubuntu 16.04 2.6 2024-07-10 2025-07-10 .NET Runtime Environment Runtime Version End of support Deprecated Decommission .NET 8 Ubuntu 22.04 8 .NET 6 Ubuntu 22.04 6 2024-11-12 2025-11-12 .NET 3 Ubuntu 16.04 3 2024-07-10 2025-07-10 .NET 2 Ubuntu 16.04 2 2024-07-10 2025-07-10 .NET 1 Ubuntu 16.04 1 2024-07-10 2025-07-10
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-07 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["This page outlines the support lifecycle for various language runtimes within the App Engine flexible environment, including Go, Java, Node.js, Python, PHP, Ruby, and .NET."],["Several older runtime versions across Go, Java, Node.js, Python, PHP, Ruby, and .NET will reach their end of support on 2024-07-10 and be deprecated on 2025-07-10."],["Newer versions of each language runtime are typically supported on Ubuntu 22.04, with older versions using older systems such as Ubuntu 16.04, Ubuntu 18.04, Debian 9, and distroless."],["The dates provided are subject to change due to the qualification and stability of releases, so it is recommended to revisit this page for updates."],["Each major Go release will be supported until there are two newer major releases, per Go's release policy."]]],[]]
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