Hi Darden applicants. I am current Darden SY and can speak a little to the timeline for interview invites. When I applied, invites for Round I BEGAN to come out in early November. The key thing to remember is that an applicant can receive and interview invite any time, all the way up to that round's acceptance decisions go out. Basically, if you don't receive an interview invitation in October or November, don't worry.
Let me know if I can help with any other questions.