November is National Novel Writing Month (NaNoWriMo), which celebrates its tenth anniversary this year. ("National" is a misnomer; writers sign up from all over the world.)
NaNoWriMo is a challenge to write 50,000 words of fiction during the month of November. Planning can be done earlier, but the writing itself can't begin until the stroke of midnight that marks the beginning of November 1st. Pens down at the stroke of midnight that ends the 30th.
This is my third year of NaNo-ing, and I hope to do better than my two previous attempts, at least. Come cheer me on under my alias of "BlockBreaker"! Watch me spew out never-before-seen quantities of utter rubbish!
The official NaNo site
My own site
PS - The widget in my signature below will monitor my output. It will only be updated when I update my work at the NaNo site, which will probably be every few days or so.