I also predicted it based on similar data. (I'm a nobody, so I can't claim to have predicted it "publicly". I don't think I even did so in an HN post. Also, I don't gather data or have sources - I just read stuff.)

I saw all the buildup during the Olympics, and I said that it was going to happen once the Olympics were over. I was two days early - I predicted Tuesday, it happened on Thursday.

I wasn't "three months" ahead of time - more like a week.