PEP: 596
Title: Python 3.9 Release Schedule
Version: $Revision$
Last-Modified: $Date$
Author: Łukasz Langa <lukasz@python.org>
Discussions-To: https://discuss.python.org/t/pep-596-python-3-9-release-schedule-doubling-the-release-cadence/1828
Status: Draft
Type: Informational
Content-Type: text/x-rst
Created: 04-Jun-2019
Python-Version: 3.9


Abstract
========

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

.. Small features may be added up to the first beta
   release.  Bugs may be fixed until the final release,
   which is planned for beginning of October 2020.


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 major 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.)

Expected:

- 3.9.0 beta 4: Monday, 2020-06-29
- 3.9.0 beta 5: Monday, 2020-07-20
- 3.9.0 candidate 1: Monday, 2020-08-10
- 3.9.0 candidate 2: Monday, 2020-09-14
- 3.9.0 final: Monday, 2020-10-05

Subsequent bugfix releases at a monthly cadence.


3.9 Lifespan
------------

3.9 will receive bugfix updates approximately every month for
approximately 12 months.  After the release of 3.10.0 final, a final
3.9 bugfix update will be released.  After that, it is expected that
security updates (source only) will be released until 5 years after
the release of 3.9 final, so until approximately October 2025.


Features for 3.9
================

Implemented PEPs for 3.9 (as of 3.9.0 beta 1):

* :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


Copyright
=========

This document has been placed in the public domain.


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