Here's a new holiday to add to your calendar. It's Monkey Day on December 14:

Monkey Day is an annual holiday celebrated on December 14th that offers people a reprise from the traditional religious holidays permeating the month of December. Monkey Day is a fun way to celebrate all things simian, an excuse to hang out with friends and family dressed as monkeys and grunt at one another, and at the same time promoting knowledge and awareness of monkeys and their simian kin in a healthy manner. Monkey Day began five years ago as a practical joke left scribbled on a friend's calender, when the anointed date of December 14th came around a Monkey themed party gathered at the local bar and Monkey Day was born. Each year since, Monkey Day has grown in popularity, especially among the college crowd, falling dangerously close to the end of semester final exam week. Popular ways of celebrating Monkey Day include throwing a monkey themed party and dressing up as your favorite simian, grunting like a chimp all day long, and throwing feces on passers-by ( for legal purposes, monkeyday.com in no way supports the latter form of celebration ).

You can find more info at monkeyday.com. It sounds like as good an excuse for a party as any. But I worry that people will spend Monkey Day "grunting like a chimp," not realizing that chimps aren't monkeys. (Though I realize that Simian Day, while more accurate, wouldn't have quite the same ring to it.)