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Feb 13, 2019

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 Active LTS 2018-01-18 2019-11-26 2021-11-01 2022-11-01
5.x Active LTS 2021-05-05 TBD 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
  • Security 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 security 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.x in May 2021 (bug fixes and docs)
  • v4.7.x TBD

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)

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Bootstrap Release Working Group

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