Ninja graphic
Image credit: <a href="https://pixabay.com/en/ninja-japan-fighter-martial-arts-153355/">Pixabay</a>

Today’s special observance is every bit as serious and authentic as Talk Like a Pirate Day. Only stealthier! In 2003, the parody site Ninja Burger, which doesn’t actually sell burgers but which claims delivery anywhere in the world within 30 minutes “starting at only $99.99,” designated December 5 Annual Day of the Ninja, though it also goes by “International Ninja Day,” “International Creep Like a Ninja Day,” and “Sneak Like a Ninja Day.” So today, wear black; be quick, silent, and (metaphorically) deadly; and, I guess, eat hamburgers.