This comment seems like something others will want to see. Before the title is corrected (five hours so far), the comment is useful for people who didn't notice the wrong date, or did notice and wondered if anyone had emailed the mods. After the title is corrected, the comment is a useful place to explain why the mistake happened and learn a little about the process that changes the titles.

And if the user is interested in that change to actually happen, contacting the moderators is the best way of doing it. They might not be aware of that, which is why I mentioned it, so that they and others reading the comment know in the future.