There is no schedule of when packages are to be upgraded due to many reasons. Entropy team generally works daily and it all depends on when the package is available in portage and is safe to build. Sometimes a new package can pull unwanted things and so it it left behind till resolved. A package not in portage would require more attention and time, so you see it can be impossible to have a schedule that could be truly followed. I tell you tomorrow we will have the package and than that time comes and goes, people will start rioting with pitch-forks and torches.