Hermione first met Harry Potter and Ron Weasley aboard the Hogwarts Express, who Hermione was born to Mr and Mrs Granger on 19 September, 1979.
Character development. Hermione Jean Granger is a Muggle-born, Gryffindor, who becomes best friends with Harry Potter and Ron Weasley. J.K. Rowling states that she was born on 19 September 1979 and she was nearly twelve when she first attended Hogwarts.
Hermione Granger illustrated by Jim Kay. From bookish Hermione Granger fact file Harry and Hermione using the Time Turner in the Prisoner of Azkaban