It doesn't work like that. There isn't a "deadline" for the first board, and there are also boards about every 3 weeks in the fall and spring. Generally speaking, if you have everything completed (online application, teachers recs, forms, fitness test, interview, etc.) 30 days prior to the start of a board, you have a decent chance of making it. That varies, though. The first board every fall is generally around the last week of September.