Final answer:
In To Kill a Mockingbird, Calpurnia's exact age is not mentioned, but she is likely older than Scout and Jem. Her birth year can be estimated to be around the early 1900s, but her birthday is not mentioned in the book.
Step-by-step explanation:
In the novel To Kill a Mockingbird by Harper Lee, the character Calpurnia, known as Cal, is the Finch family's housekeeper and nanny. Her exact age is not explicitly stated in the book, but it can be inferred that she is older than the children, Scout and Jem, as she has been working for the family for a long time. Since the story is set in the 1930s, Cal's birth year can be estimated to be around the early 1900s. As for her birthday, the book does not provide any specific information about when it is.