I interviewed for Brandeis Neuro some time ago (accepted, but I chose another school). Brandeis Neuro does rolling interviews, if they're sending an invite now, it means they really want you. I would say the interview date doesn't matter. I did the last one they had and they accepted me within a few days.
They're a fantastic program btw. I almost picked them. Their interview is lengthy but it flew by for me, I would say its your standard interview with professors and chats with students.