Time release is compatible up to 2.8.6 and since it hasn’t had an updated in two years, it most likely isn’t a plugin you should keep using.
Post queue seems to be in the same boat. I would say the best thing you can do is search for a new plugin (I don’t know of one), modify the ones you have or hire someone to write a completely new one.
From a code standpoint it shouldn’t be overly complex to simply skip two days so no posts go on those days.
