Hello Julio,

Hm, not entirely sure what do you mean by change a post date manually but you could already set a date when posting your blog post as you can see here, http://take.ms/w3otU

It's ok now

I couldn't see that option because it was disabled in settings.

Thank you!

Yeah, it was disabled by default as most authors don't really use it. You could always turn this on if you need to