Is good for SEO update blog post dates after update post content

[maestrosonrisas]

Hello I am updating some posts of my Blog, adding new and fresh content and rewriting some of the existing.

After doing that I am thinking to update de post publishing so that I appears on front page of the blog and user can read ir again.

But I don't know if it is good for google to change the publishing date of the post that he had indexed 5 years ago.

Also I don't know if google will read it again if it is old and see the new changes in order to improve it in search results

[GastonRiera]

Hi Dario,

Yes, when revamping and improving your content... update the publication date too. 
I cant assure you that Google will use it as a ranking factor, but it will help searchers in Google when they see the updated time.

Yes, googleBot does recrawl every page of your site. If you think that it's been too long since visited that particular page, then you could manually request a crawl in Search Console: In Crawl -> Fetch as Google.

Hope it helps.
Best luck.
GR