"This July" vs "This past July" [closed]

Which of the two forms is correct when referring to July of 2021? What is the contribution of past, if any?

"This past July" removes the ambiguity which can exist when referring to "This July" and places the reference clearly in the past. It is the opposite of "This coming July" which disambiguates in the opposite direction. "This past July" refers to the most recently passed and "This coming July" refers to the most imminent one.

Normally the context and the tense of an associated verb render the use of either "past" or "coming" unnecessary. For instance "This July we went to Italy" and "This July we are going to Greece." are completely unambiguous since you can't "have gone" in a month that has not yet arrived nor can you be "going" in one that is past (unless you have access to a Tardis or an adapted Delorian).