Traditionally December 5 is the day before the St. Nicholas Feast Day. Who was St. Nicholas? Read up on him here. Today’s Santa Claus is very loosely based off this historical character but a couple interesting things to note are 1)That the origin of Santa’s red suit is likely the red uniform of a bishop. In some countries, Santa is actually depicted complete with a mitre; 2) That he was a bishop during many of the persecutions in Rome; And 3) That some traditions attribute a story of him hitting Arius in the face out of indignation at the Council of Nicea.