Have a blog/news/articles on your website? Be sure to keep it current or remove it.
If the information is timeless, remove the dates if it’s not current. If you’re an accountant and your last update is about the 2016 tax law changes, remove your blog altogether. It’s doing more harm than good. Your visitors will question if your website information is accurate or if your company is still in business. Questions you don’t want them to have and could ultimately end in them doing business with your competitor.