Someone PMed me to ask about Cornell's notification dates/scholarship dates, etc. Here's what happened last year, for R3, which is when I applied.
Application due early Jan.
Interview invite very quick after that.
Admitted early as I was a Park finalist. (This must have been sometime in Feb, though the notification date was in March sometime.)
Park weekend in early March.
Park notification within a week.
Acceptance deadline was around April 1. Acceptance deadlines for scholarship/park recipients wer earlier than the regular one.
Key Take-Aways:
If you get scholarship money or the Park, your dates are likely to be moved up a bit.
They won't make you accept until after you know what your financial package is.
Disclaimer: I'm not at Cornell, this is what I remember from last year, I applied in R3, which may be different from R1/2. Also, they could have changed everything from last year to this year.