A Pennsylvania blue law forbidding the sale of various retail products on Sunday was not an unconstitutional interference with religion as described in the First Amendment to the United States Constitution. Decided May 29, 1961 (argued December 8, 1960). Opinion of the Court: Earl Warren → go there Dissenting: Douglas, Stewart. Applied: the First Amendment → go there Topic: Freedom of religion. Braunfeld v. Brown, 366 U.S. 599 (1961), was a landmark case on the issue of religious and economic liberty decided by the United States Supreme Court. In a 6–3 decision, the Court held that a Pennsylvania blue law forbidding the sale of various retail products on Sunday was not an unconstitutional interference with religion as described in the First Amendment to the United States Constitution. Wiki link