Last year I came up with the idea of the "Personal Book Writing Quarter". It's a lot like NaNoWriMo, except for three things: 1) it's personal, 2) you can write any book, not just a novel, and 3) it lasts three months instead of one.
I originally envisioned the quarter taking up October, November, and December and each of the three months covering: Planning, Writing, Revising. However, something about the calendar flipping over from August to September really sets my brain to writing again and I simply can't wait. (Besides, December is never a full month anyway, so it doesn't count toward book progress.)
So here we go again, where "we" is "I". Last year I tried to get a few people to do this with me until I realized that sorta violated the "personal" part of PerBoWriQua. That doesn't mean you can't do it either. It just means you can't tell anyone about it. Otherwise one thing leads to another and suddenly it's national again. And we can't have the entire nation all writing books during the same calendar period. That'd be crazy!