On the Symfony blog there's a new post from Javier Eguiluz talking about improvements to the Symfony release process that will be starting with the 3.0.0 stable release (already release so already in place).
The Symfony Release Process is arguably one of the best selling points of the Symfony project. Thanks to our predictable and transparent process, companies can plan years in ahead their Symfony integration.
The recent launch of Symfony 2.8, which will be the last minor version of the 2.x branch, made us think about further tweaks in the release process. That's why during his past SymfonyCon Paris 2015 keynote, Fabien Potencier announced the new Symfony release process.
The main changes for the process are around how many minor versions will be published, standard vs long term support status of these releases and the timing of major/minor releases. With this schedule in place, it's projected that Symfony 4 will be released in November of 2017.