In the first movie/book, Hagrid collects Harry on his birthday and takes him to get his school supplies. This, however, is where the similarities end. In the book, Hagrid is takes Harry back to the Dursleys. In the movie, however, Hagrid takes Harry straight to the train station and leaves. Nevermind the fact that Harry does not know where Platform 9 and 3/4 is at in the first place. However the start of term is not until September 1st. In the movie, it suggests that the start of term is August 1st.