Yes, it is Dec 20th. I was just saying that since I won't hear from Mercer until Dec 20th, I have put down a deposit at Nova as their date to save a spot is Nov 25th.
As for the number of people interviewing, I was in the 8am group and there were about 24 or so in that one. I didn't know there was a group after yours but I did hear someone mention that they were interviewing about 60 that day.
I also don't think they will have another interview date this year, but I'm sure they will have one next year since their final application deadline was Nov 15th.