Stephen Nissenbaum

“The Puritans knew what subsequent generations would forget: that when the Church, more than a millennium earlier, had placed Christmas Day in late December, the decision was part of what amounted to a compromise, and a compromise for which the Church paid a high price. Late-December festivities were deeply rooted in popular culture, both in observance of the winter solstice and in celebration of the one brief period of leisure and plenty in the agricultural year. In return for ensuring massive observance of the anniversary of the Savior's birth by assigning it to this resonant date, the Church for its part tacitly agreed to allow the holiday to be celebrated more or less the way it had always been. From the beginning, the Church's hold over Christmas was (and remains still) rather tenuous. There were always people for whom Christmas was a time of pious devotion rather than carnival, but such people were always in the minority. It may not be going too far to say that Christmas has always been an extremely difficult holiday to Christianize. Little wonder that the Puritans were willing to save themselves the trouble.”
― Stephen Nissenbaum, The Battle for Christmas: A Cultural History of America's Most Cherished Holiday