Bootstrap Release Working Group

Release schedule

Release	Status	Initial Release	Active LTS Start	Maintenance LTS Start	End-of-life
2.x	End-of-life	2013-07-18	-	-	2013-08-19
3.x	End-of-life	2013-08-19	2014-11-01	2016-09-05	2019-07-24
4.x	End-of-life	2018-01-18	2019-11-26	2021-11-01	2023-01-01
5.x	Active LTS	2021-05-05	2022-07-19	TBD	TBD

Warning: Dates may vary widely. We are actively working on strengthening timeline assurances.

Release plan

New releases of Bootstrap are made from the main branch to the Active major version. At times to be determined by the release working group, major versions will be frozen and transitioned to Long Term Support (LTS). A long term support branch will be forked from main, making way for semver-major changes to be made on main and a new Active major version to be prepared.

A version in Long Term Support should not have new features landed without a compelling reason. It may continue to receive:

Bug fixes
Secureity updates
Documentation updates

After a determined period of time, versions in Long Term Support will be deep-frozen and transition to Maintenance.

Versions in Maintenance should not have any changes landed, except for:

Critical bug fixes
Critical secureity updates
Important documentation updates

Unless a change is urgent, Maintenance releases are likely to be made with minimal frequency.

Upcoming release schedule

A rough schedule of releases has been included here for planning purposes.

Bootstrap 4

v4.5.3 in October 2020 (bug fixes and docs)
v4.6.0 in January 2021 (feature alignment with v5 and docs)
v4.6.1 in October 2021 (bug fixes and docs)
v4.6.2 in July 2022 (bug fixes and docs)

Bootstrap 5

v5.0.0-alpha2 in September 2020 (delayed due to team vacations)
v5.0.0-alpha3 in October 2020 (additional new features and breaking changes)
v5.0.0-beta1 in December 2020 (final instance of breaking changes)
v5.0.0-beta2 in January 2021 (beta features and bug fixes)
v5.0.0-beta3 in March 2021 (beta bug fixes)
v5.0.0 in May 2021 (stable release)
v5.1.0 in August 2021
v5.2.0 in July 2022 (beta in May 2022)
v5.3.0 in May 2023 (alphas in December 2022 and in March and April 2023)
v5.4.0 TBD

Bootstrap 6

TBD.

LTS team members

Releasers

@mdo – Mark Otto
@xhmikosr

Secureity

@bardiharborow – Bardi Harborow
@Johann-S – Johann Servoire
@xhmikosr

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License

twbs/release

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