What is the allusion of "July filariasis, T.A." What kind of representativeness is there?

The word "fire in July" comes from the Book of Songs, national wind and hurricane. The word "fire" is a star, and "flow" means moving, moving and falling. Together, these four words are "When the weather turns cold in July and it is just dark, you can see the big Mars falling from the west", which is commonly understood as July.

As a complete word or sentence, "t.a" has never appeared in ancient books, let alone its origin. If you have to explain it, it literally means "August is not over yet." That Annie Baby once had a novel called T.A., but I really don't know what is the profound connection between the content and the title, but there is a character named Weiyang.