I’m surprised that this topic hasn’t been discussed and I can’t find anything on the help page regarding this subject so I apologise if this is covering old ground.
What is meant by Release Date?
I assume that it means the date the submitted edition was actually published and not the date the work was first published. I have noticed that a lot of edition submissions list the original date of publication. Unless some users on this site own first editions (including a first edition of a Shakespeare poem) then I think this is a misinterpretation.
It would be helpful to have the definition included on the help page.