December became the tenth month of the calender when... hey! Stupid Romans! can't you guys count?
It is a festive month filled with holidays. The first is Barbie and Barney Backlash Day where all children who like either are sacrificed to Pedo Bear and the demons of Hell. After all, both characters are intended for gay adults.
The big holiday in December is Xmas. Santa Porn gets in his sleigh and delivers dildoes and online porn site subscriptions to all the little boy and girls. Everyone goes around dressed as their favorite porn star, pretty easy since those folks are usually naked. On Xmas day, everyone piles into a big orgy and exchanges STDs with each other.
Then comes New Ears Eve, when everyone gets totally drunk to blot out the horrible memories of the previous holidays mentioned and cuts off at least one ear as penance.