Bootstrap End of Life Dates
FrameworksAll 4 Bootstrap release branches: support windows, latest releases, and what each EOL branch has missed since. Updated daily — last refresh 2026-10-05.
1still supported
3end of life
Support lifecycle at a glance
■ supported ■ security fixes only ■ end of life
All versions
Release dates, critical support dates and current support status for every Bootstrap branch.
| Branch | Released | Active Support ends | Critical Support ends | Status | Latest |
|---|---|---|---|---|---|
| 5 | 5 May 20215y 5mo ago | — | — | supported | 5.3.8 |
| 4 | 18 Jan 20188y 9mo ago | 1 Nov 2021 | 1 Jan 20233y 9mo ago | EOL | 4.6.2 |
| 3 | 19 Aug 201313y 2mo ago | 5 Sept 2016 | 24 Jul 20197y 2mo ago | EOL | 3.4.1 |
| 2 | 31 Jan 201214y 8mo ago | 19 Aug 2013 | 19 Aug 201313y 2mo ago | EOL | 2.3.2 |