As the United States becomes increasingly religiously diverse, surprisingly relatively little litigation has occurred over the celebration of religious holy days and holidays in public schools. Although the Supreme Court has addressed Christmas displays on two occasions—in Lynch v. Donnelly (1984) and County of Allegheny v. American Civil Liberties Union (1989)—neither case directly concerned public schools.

The status of holiday celebrations in public schools is a key, if seasonal, issue in light of the importance of religion in the lives of many Americans, as educators seek to teach students to appreciate diversity in all of its manifestations, including religion.