Symfony Roadmap
Symfony manages its releases through a time-based model. A new Symfony minor version comes out every six months, one in May and one in November. Check out the release process document for the full timeline details.
Latest Symfony versions
long term support version
2.8.4for projects that prioritize very long support over new features
stable version
3.0.4for projects that need the latest Symfony features
development version
3.1.0-DEVfor testing projects with the upcoming Symfony version
Check out the full Symfony version history to know which versions are still supported.
Roadmap Notifications Subscription
Symfony version checker
Symfony 3.0 is the latest stable version and it will be maintained until the end of January 2017.
Roadmap
Nov 2015 Release
Jul 2016 End of support for bug fixes
Jan 2017 End of support for security fixes

