Uncle Hammer always came to visit at Christmastime? (roll of thunder)

True.

Explanation:

Roll of Thunder is a book written by Mildred D. Taylor and I report the violent racism that black people faced during the great depression.

The book is narrated in first person, a child, who in addition to introducing his family, begins to understand what to live in the south of the country and what is racism and all the injustices that follow it.

In the book, in addition to being introduced to the narrator's family, we are introduced to a character named Hammer, who always visits during Christmastime.