Christmas Card Day
Christmas Card Day is held on December 9. This event in the first decade of the month december is annual.
World Techno Day on December 9 (Juan Atkins was born on Dec 9, 1962, and was part of the Belleville Three, so named because of their time together in Belleville, Michigan);
Poinsettia Day on December 12 (Euporbia pulcherrima is discovered in 1828 by Joel Roberts Poinsett);