December 16, 1773 The Boston Tea Party happened. The Sons of Liberty dump crates of tea into the Boston harbor in protest of the Tea Act of the same year.
Or 1944 was the last major offensive of the German Army in WW2 known as the Battle of the Bulge.
December 5, 1955 was the beginning of the Montgomery bus boycott lead by Martin Luther King, Jr.
December 18th is National Suckling Pig Day. Possibly a little piggie cap with an apple in his mouth.
That's all I got; love the idea of a month long raffle dedicated to random events/holidays. Justifies my constant checking of the artisan thread :-)