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

Runtime Environment Runtime Version End of support Deprecated Decommission
Go 1.22 Ubuntu 22.04 1.22
Go 1.21 Ubuntu 22.04 1.21
Go 1.20 Ubuntu 22.04 1.20 2024-11-01 2025-11-01
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

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 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 3.12 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 8.3 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 3.3 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