Hallmark introduced its first Christmas cards in 1915, five years after the
founding of the company.

Historians have traced some of the current traditions surrounding Father
Christmas, or Santa Claus, back to ancient Celtic roots. Father Christmas's
elves are the modernization of the "Nature folk" of the Pagan religions;
his reindeer are associated with the "Horned God," which was one of the
Pagan deities.