The Bioconductor Release 3.12 Schedule has been posted and is tentatively scheduled for October 28th. Important deadlines can be found on the website and will be posted here and on the bioc-devel at r-project.org mailing list. As a quick summary:

October 2: New package submission deadline (packages will still need to pass the formal review process to be included). Package submitted after this date are not guaranteed to be reviewed; they will be reviewed time pending.

October 13 Current Release 3.11 Freeze. No changes will be accepted to the Bioconductor 3.11 branch after this date.

October 21 No API changes to devel 3.12. Also, newly submitted packages need to be accepted by this date to be included in the release

October 23 Deadline for packages to be passing R CMD install/build/check.

October 27 Devel 3.12 branch is frozen to create release branch.

October 28 Release Bioconductor 3.12