Often people don't notice right away that it's old, or aren't aware of the HN convention to include that in the submission title, or just forget. I agree it sho

Often people don't notice right away that it's old, or aren't aware of the HN convention to include that in the submission title, or just forget. I agree it should be there. (I've also seen people argue it shouldn't because it may prejudice a reader from reading it.) Sometimes the submitter will notice comments about the year and update it. Sometimes mods do. If you contact the mods via the Contact link in the footer, they'll update it. They're quite responsive.