Q:

Does CC0 require a year/author line the same way other licenses do?

As explained in this answer software licenses that assert some form of copyright should include a year/author or they may not be recognized in the case of a future dispute.
Does the same thing apply to CC0? The CC0 FAQ recommends it, but doesn't require it and it isn't accompanied by a "Copyright ©" so it obviously isn't the same thing as in the answer linked above.
If it is required, does it have to be set in stone forever? So if I use my GitHub username and then change that username later (or change my contact e-mail) am I allowed to change it in the author note? Or does this void the license?

A:

Since CC0 is essentially a way of waiving copyright, you don't need to add a 
"Copyright (C) ..." line.  I generally replace that with a "written by Joe Blogs 201x" to allow subsequent users/distributors to keep track of the code's history
but that is not required.

