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Python Enhancement Proposals

PEP 596 – Python 3.9 Release Schedule

Author:
Łukasz Langa <lukasz at python.org>
Discussions-To:
Discourse thread
Status:
Final
Type:
Informational
Topic:
Release
Created:
04-Jun-2019
Python-Version:
3.9
Table of Contents

Abstract

This document describes the development and release schedule for Python 3.9. The schedule primarily concerns itself with PEP-sized items.

Release Manager and Crew

  • 3.9 Release Manager: Łukasz Langa
  • Windows installers: Steve Dower
  • Mac installers: Ned Deily
  • Documentation: Julien Palard

Release Schedule

3.9.0 schedule

Note: the dates below use a 17-month development period that results in a 12-month release cadence between feature versions, as defined by PEP 602.

Actual:

  • 3.9 development begins: Tuesday, 2019-06-04
  • 3.9.0 alpha 1: Tuesday, 2019-11-19
  • 3.9.0 alpha 2: Wednesday, 2019-12-18
  • 3.9.0 alpha 3: Saturday, 2020-01-25
  • 3.9.0 alpha 4: Wednesday, 2020-02-26
  • 3.9.0 alpha 5: Monday, 2020-03-23
  • 3.9.0 alpha 6: Tuesday, 2020-04-28
  • 3.9.0 beta 1: Monday, 2020-05-18 (No new features beyond this point.)
  • 3.9.0 beta 3: Tuesday, 2020-06-09 (beta 2 was recalled.)
  • 3.9.0 beta 4: Friday, 2020-07-03
  • 3.9.0 beta 5: Monday, 2020-07-20
  • 3.9.0 candidate 1: Tuesday, 2020-08-11
  • 3.9.0 candidate 2: Thursday, 2020-09-17
  • 3.9.0 final: Monday, 2020-10-05

Bugfix releases

Actual:

  • 3.9.1 candidate 1: Tuesday, 2020-11-24
  • 3.9.1 final: Monday, 2020-12-07
  • 3.9.2 candidate 1: Tuesday, 2021-02-16
  • 3.9.2 final: Friday, 2021-02-19
  • 3.9.3 final: Friday, 2021-04-02 (security hotfix; recalled due to bpo-43710)
  • 3.9.4 final: Sunday, 2021-04-04 (ABI compatibility hotfix)
  • 3.9.5 final: Monday, 2021-05-03
  • 3.9.6 final: Monday, 2021-06-28
  • 3.9.7 final: Monday, 2021-08-30
  • 3.9.8 final: Friday, 2021-11-05 (recalled due to bpo-45235)
  • 3.9.9 final: Monday, 2021-11-15
  • 3.9.10 final: Friday, 2022-01-14
  • 3.9.11 final: Wednesday, 2022-03-16
  • 3.9.12 final: Wednesday, 2022-03-23
  • 3.9.13 final: Tuesday, 2022-05-17 (Final regular bugfix release with binary installers)

Source-only security fix releases

Provided irregularly on an “as-needed” basis until October 2025.

  • 3.9.14 final: Tuesday, 2022-09-06
  • 3.9.15 final: Tuesday, 2022-10-11
  • 3.9.16 final: Tuesday, 2022-12-06
  • 3.9.17 final: Tuesday, 2023-06-06
  • 3.9.18 final: Thursday, 2023-08-24
  • 3.9.19 final: Tuesday, 2024-03-19
  • 3.9.20 final: Friday, 2024-09-06
  • 3.9.21 final: Tuesday, 2024-12-03
  • 3.9.22 final: Tuesday, 2025-04-08
  • 3.9.23 final: Tuesday, 2025-06-03
  • 3.9.24 final: Thursday, 2025-10-09
  • 3.9.25 final: Friday, 2025-10-31

3.9 Lifespan

3.9 received bugfix updates approximately every 2 months for approximately 18 months. Some time after the release of 3.10.0 final, the ninth and final 3.9 bugfix update was released. After that, security updates (source only) were released until October 31st 2025, that is 5 years after the release of 3.9 final.

As of 2025-10-31, 3.9 has reached the end-of-life phase of its release cycle. 3.9.25 was the final security release. The codebase for 3.9 is now frozen and no further updates will be provided nor issues of any kind will be accepted on the bug tracker.

Features for 3.9

Implemented PEPs for 3.9:

  • PEP 573, Module State Access from C Extension Methods
  • PEP 584, Add Union Operators To dict
  • PEP 585, Type Hinting Generics In Standard Collections
  • PEP 593, Flexible function and variable annotations
  • PEP 614, Relaxing Grammar Restrictions On Decorators
  • PEP 615, Support for the IANA Time Zone Database in the Standard Library
  • PEP 616, String methods to remove prefixes and suffixes
  • PEP 617, New PEG parser for CPython

Source: https://github.com/python/peps/blob/main/peps/pep-0596.rst

Last modified: 2025-11-10 12:03:32 GMT