Boss's Day this year fell on Saturday, October 16, 2010. So, if you forgot about it altogether, you can buy yourself a little extra time by announcing, "Gee whiz, Boss's Day fell on a weekend, so I had to catch you this week."
I didn't know that forgetting a key date was actually the origin of Boss's Day:
Patricia Bays Haroski registered "National Boss' Day" with the U.S. Chamber of Commerce in 1958. She was working as a secretary for State Farm Insurance Company in Deerfield, Illinois at the time and chose October 16 because she forgot that the birthday of her boss, who was her father, was actually on the 16th. Four years later in 1962, Illinois Governor Otto Kerner backed Haroski's registration and officially proclaimed the day.
One of my fave blogs, Cake Wrecks ("when professional cakes go horribly, hilariously wrong"), devoted a whole post to Boss's Day cakes - including the charming cake below. The post provides a step-by-step guide for how not to impress your boss, and perhaps supports the argument that it would be best just to lie low and forget the celebratory cake altogether.
(The Cake Wrecks post features another one of my punctuation pet peeves: your vs. you're. Do not get me started.)Whatever you do for your boss, make sure you do it with your co-workers; Emily Post says giving your boss an individual gift makes you look like a brown noser.
Or you could just tell your boss a really funny joke (hubba hubba hubba).
Sources: Wikipedia; Cake Wrecks