From The Official NaNoWriMo Website
National Novel Writing Month (NaNoWriMo) is a fun,
seat-of-your-pants approach to creative writing.
On November 1, participants begin working towards the goal of
writing a 50,000-word novel by 11:59 PM on November 30.
Valuing enthusiasm, determination, and a deadline,
NaNoWriMo is for anyone who has ever thought about writing a novel.