[antjanus]

I can't be the only one thinking that:

1. it's possible the author double checks the content each year and redates so that visitors know it still applies

2. the author updates the article to be current and redates it

It's a little weird to say this is "blogwashing". It's pretty common (for me at least) to check the date of an article when it's a tutorial so I know if it's current or not. And I've seen this happen before where authors append a "changelog" to the article at the end so you know that it's up to date.