Is this some sort of Black Hat trickery going on?

I recently noticed this. My competitor has over 40 pages of blog posts.

Every single topic and every single day, each and every blog get's updated with current date.

Is this tricking Google into thinking it's being updated everyday so giving the site more authority?

If so, how is this being done?

He's just setting the posting date to the current date. It's not blackhat and won't influence Google.

It's mostly used so readers think they are seeing new content. But it won't fool readers for long either.

It is very common to see on sales and landing pages.

RRunner said:

He's just setting the posting date to the current date. It's not blackhat and won't influence Google.

It's mostly used so readers think they are seeing new content. But it won't fool readers for long either.

It is very common to see on sales and landing pages.

Click to expand...

So is there a plugin for this... I doubt he's doing manually one by one and updating as their are hundreds of blog posts that all get updated.

Probably many plugins. You can do it easily with PHP or JavaScript using library functions. No custom coding needed.

In WordPress you don't need a plugin, they have a built-in short code. You can insert the current date in any post anywhere you want like this:
[current_date]

If a theme doesn't have it in the options just edit the page/post template.