Editing of a comment is only possible for 2 hours after posting. This is to prevent people from trying to "rewrite history" at any time in the future. But in a

Editing of a comment is only possible for 2 hours after posting. This is to prevent people from trying to "rewrite history" at any time in the future. But in a case like this, dang may be happy to let you edit or delete the comment. You should email hn@ycombinator.com to request this.