Somewhere on this site, probably the transportation board but I can't find it, someone was nice enough to post when JB has opened up their schedule in the past. It goes back quite a few years but I don't think It's always the same year after year. This past time I happened to be on their site and noticed they had the date listed, it was about 3 weeks out. It was the first time I had noticed it that far in advance, so I'm not sure if it's something new or not. You can sign up for e-mails and they will let you know when they are expanding. I used to get it a few days prior now it seems I get it about 2 hours after they expand it.