Answer:
Through the deductions of the numerous time frames given in the story, the narrator gives ample clues to show the time frame of the whole event, which is most probably between the summer of 1933 and 1935, the year of the trial of Tom Robinson.
Step-by-step explanation:
In Harper Lee's "To Kill A Mockingbird" novel, the author does not specify the exact years the story takes place. But there are some clues or "events" that are mentioned in the story that can be suggestive of the time frame of the story.
First off was the mention of the Jim Crows laws, which suggest that it is a time of the racial discrimination in the American nation. This is also an important aspect of the Tom Robinson trial that occurs in the summer of the year Dill came to Maycomb. Chapter 20 includes the speech of Atticus where he mentions "this year of grace, 1935", while the trial was underway. The novel starts with the summer that Dill first came to Maycomb, when Scout was "almost six and Jem was nearly ten". He appears for two summers consecutively but missed the next summer, only to turn up later during the Tom Robinson trial after he ran away. So, by deducing the time frame, the trial was during 1935, so the year Dill first came to Maycomb can be deduced as most probably the summer of 1933, when Jem was nearly 10.
Then, the novel ends with the time when Jem "was nearly thirteen, [having] broken [his arm] at the elbow" as seen in Chapter 1. So, we can be sure that the story covers three years.
Another added detail is the use of the word "ni gger- lover" in many instances, which is clearly suggestive of the racism time. Also, there are a couple of times the "depression" is mentioned, further providing detail that the story takes place during the 1930s.