Penne Restad of the University of Texas in Austin and the author of Christmas in America describes how the celebration of Christmas in the United States began to come together in the 1850s.

The swirl of change caused many to long for an earlier time, one in which they imagined that old and good values held sway in cohesive and peaceful communities. It also made them reconsider the notion of ‘community’ in larger terms, on a national scale, but modelled on the ideal of a family gathered at the hearth. At this cross-roads of progress and nostalgia, Americans found in Christmas a holiday that ministered to their needs. The many Christmases celebrated across the land began to resolve into a more singular and widely celebrated home holiday. . . .

The ‘American’ holiday enveloped the often contradictory strains of commercialism and artisanship, as well as nostalgia and faith in progress, that defined late nineteenth-century culture. Its relative lack of theological or Biblical authority – what had made it anathema to the Puritans – ironically allowed Christmas to emerge as a highly ecumenical event in a land of pluralism. It became a moment of idealized national self-definition.