I find it useful to know if the site is updated regularly.
Unless you are in a strange place were there are legal issues, I'd keep it up to date, preferably with a dynamic year.
If you have legal issues, I'd add in a dynamic 'last updated' or range.
I realize that date of publication of the particular article can be different from date of most recent publication, so I don't immediately throw out the site, but if it looks dormant I may leave and go to another site.