December 16th is known as O Sapientia (I read in my much loved Maypoles, Martyrs and Mayhem), after the anthem traditionally sung today. It heralds, apparently, the start of the Mince Pie Season (to everything there is a season..........LOL).
Listen to the Gregorian chant here:
Foundn thisi interesting, as had never heard of it before; lovely to listen to, albeit very short. Will therefore be making mince pies today :)