The day after Christmas is Saint Stephen's Day, aka the Feast of Saint Stephen which celebrates the first Christian martyr. That day varies between December 26 or 27 depending on which Calendar by which your church schedules.
The day is mentioned in the old Christmas carol Good King Wenceslas which relates the story of a Bohemian king to give alms to a poor peasant during the cold of Winter upon the Feast of Stephen.
The story of Saint Stephen itself is a wonder of professing faith with the speech given by him at the time of his stoning, the fact that Saul of Tarsas (later to be known as the Apostle Paul) held the cloaks of those who participated in his murder, and the ultimate location of the original site and the conditions surrounding the discovery of his relics — as well as those miracles attributed to them when they were transported for enshrinement.
It's an amazing account of just how far faith can take one before, during, and after the clay pot — which is our earthly body breaks and the spirit returns to He who made it.