3.9.0 schedule

Note: the dates below use a 17-month development period that resultsin a 12-month release cadence between major versions, as defined byPEP 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: Monday, 2021-02-16
• 3.9.2 final: Monday, 2021-02-19
• 3.9.3: Friday, 2021-04-02 (security hotfix; recalled due to bpo-43710)
• 3.9.4: Sunday, 2021-04-04 (ABI compatibility hotfix)
• 3.9.5: Monday, 2021-05-03
• 3.9.6: Monday, 2021-06-28
• 3.9.7: Monday, 2021-08-30
• 3.9.8: Friday, 2021-11-05 (recalled due to bpo-45235)
• 3.9.9: Monday, 2021-11-15
• 3.9.10: Monday, 2022-01-14
• 3.9.11: Wednesday, 2022-03-16
• 3.9.12: Wednesday, 2022-03-23
• 3.9.13: Tuesday, 2022-05-17 (final regular bugfix release with binaryinstallers)

Source-only security fix releases

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

• 3.9.14: Tuesday, 2022-09-06
• 3.9.15: Tuesday, 2022-10-11

3.9 Lifespan

3.9 will receive bugfix updates approximately every 2 months forapproximately 18 months. Some time after the release of 3.10.0 final,the ninth and final 3.9 bugfix update will be released. After that,it is expected that security updates (source only) will be releaseduntil 5 years after the release of 3.9 final, so until approximatelyOctober 2025.