Just like the others have said: mostly November-January.
I had one in October, 8 in November, 7 scheduled in December, and 1 in January.
I would second doing some practice ones at the beginning, but would also STRONGLY push you to do the ones you're interested in, say as numbers 4-10, because you will get sick and tired of interviewing. I can say that of the 8 I have left, I plan to go to 2 or maybe 3 of them.