Go ahead, use a pencil...because we all know you're to bail on your co-worker's open mic night. While it won't fit in a pocket (unless you have an old pair of JNCOs laying around), it's the perfect size to tuck into any bag or backpack. We've already put in all the dates, the fixed holidays, and tons of extra stuff like daily random holidays (it was Work Like A Dog Day when we wrote this, ironically), celebrity birthdays, and other bits of trivia. With knowledge like this, you'll be the life of the party that you probably didn't want to go to in the first place. All you have to do is fill in the year and what day of the week each day is on. Simple.
Dimensions: 7.5″ x 4.8″ x 0.6″