Runtime support schedule

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

RuntimeEnvironmentRuntime VersionEnd of supportDeprecatedDecommissioned
Go 1.23Ubuntu 22.041.23
Go 1.22Ubuntu 22.041.22
Go 1.21Ubuntu 22.041.212026-03-032027-03-03
Go 1.20Ubuntu 22.041.202024-03-272025-03-27
Go 1.19Ubuntu 22.041.192024-07-102025-07-10
Go 1.18Ubuntu 22.041.182024-07-102025-07-10
Go 1.15Distroless1.152024-07-102025-07-10
Go 1.14Distroless1.142024-07-102025-07-10
Go 1.13Distroless1.132024-07-102025-07-10
Go 1.12Distroless1.122024-07-102025-07-10
Go 1.11Distroless1.112024-07-102025-07-10
Go 1.10Distroless1.102024-07-102025-07-10
Go 1.9Distroless1.92024-07-102025-07-10

Java

RuntimeEnvironmentRuntime VersionEnd of supportDeprecatedDecommission
Java 21Ubuntu 22.0421Oct 2031
Java 17Ubuntu 22.0417Oct 2027
Java 11Ubuntu 18.04112024-10-312025-10-31
Java 8Debian 982024-07-102025-07-10

Node.js

RuntimeEnvironmentRuntime VersionEnd of supportDeprecatedDecommission
Node.js 22Ubuntu 22.04222027-04-302028-04-30
Node.js 20Ubuntu 22.04202026-04-302027-04-30
Node.js 18Ubuntu 22.04182025-04-302026-04-30
Node.js 16Ubuntu 16.04162024-07-102025-07-10
Node.js 14Ubuntu 16.04142024-07-102025-07-10
Node.js 12Ubuntu 16.04122024-07-102025-07-10
Node.js 10Ubuntu 16.04102024-07-102025-07-10
Node.js 8Ubuntu 16.0482024-07-102025-07-10

Python

RuntimeEnvironmentRuntime VersionEnd of supportDeprecatedDecommission
Python 3.13Ubuntu 22.043.132029-10-102030-10-10
Python 3.12Ubuntu 22.043.122028-10-022029-10-02
Python 3.11Ubuntu 22.043.112027-10-242028-10-24
Python 3.10Ubuntu 22.043.102026-10-042027-10-04
Python 3.9Ubuntu 18.043.92025-10-052026-10-05
Python 3.8Ubuntu 18.043.82024-10-142025-10-14
Python 3.7Ubuntu 16.043.72024-07-102025-07-10
Python 3.6Ubuntu 16.043.62024-07-102025-07-10
Python 3.5Ubuntu 16.043.52024-07-102025-07-10
Python 3.4Ubuntu 16.043.42024-07-102025-07-10
Python 2.7Ubuntu 16.0422024-07-102025-07-10

PHP

RuntimeEnvironmentRuntime VersionEnd of supportDeprecatedDecommission
PHP 8.3Ubuntu 22.048.32027-12-312028-12-31
PHP 8.2Ubuntu 22.048.22026-12-312027-12-31
PHP 8.1Ubuntu 18.048.12025-12-312026-12-31
PHP 7.4Ubuntu 18.047.42024-07-102025-07-10
PHP 7.3Ubuntu 16.047.32024-07-102025-07-10
PHP 7.2Ubuntu 16.047.22024-07-102025-07-10

Ruby

RuntimeEnvironmentRuntime VersionEnd of supportDeprecatedDecommission
Ruby 3.3Ubuntu 22.043.32027-03-312028-03-31
Ruby 3.2Ubuntu 22.043.22026-03-312027-03-31
Ruby 3.1Ubuntu 16.043.12024-07-102025-07-10
Ruby 3.0Ubuntu 16.043.02024-07-102025-07-10
Ruby 2.7Ubuntu 16.042.72024-07-102025-07-10
Ruby 2.6Ubuntu 16.042.62024-07-102025-07-10

.NET

RuntimeEnvironmentRuntime VersionEnd of supportDeprecatedDecommission
.NET 8Ubuntu 22.048
.NET 6Ubuntu 22.0462024-11-122025-11-12
.NET 3Ubuntu 16.0432024-07-102025-07-10
.NET 2Ubuntu 16.0422024-07-102025-07-10
.NET 1Ubuntu 16.0412024-07-102025-07-10