Should You Timestamp Your Blog Posts?...Timestamping your blog posts (even with just the date) lets your readers know when it was written. It helps them decide how relevant the information is when they come across it. To them, a current or recent post may seem more attractive than one written years ago.
In most cases, including the publish date on your posts is a good thing, especially if you’re regularly creating new content. But what about evergreen content? By definition it’s always current, whether because the topic itself is timeless or it’s kept up to date. But your readers may be distracted if they see the date it was originally published...
While Darren has a point, maybe it is better to put the last date updated to show you are keeping up with the latest info?