1Major release lines in "active development" recieve regular minor releases with new features. 2Any release line in "bug and security fixes" receives patches for fixing bugs and security vulnerabilities of all severities, but no new features. 3Any release line in "security fixes only" receives patches for high severity security vulnerabilities, but no other bug fixes or new features.
Any release date in the future is when the release is expected to happen, though may need to be slightly adjusted depending on circumstances.
For more information, see the following documentation: