The Protestant Reformed Churches annually observe the “National Thanksgiving Day” with a special worship service. They have bound themselves to do so by Article 67 of the Church Order, which states: “The churches shall observe, in addition to the Sunday, also [a list of eight days, and] the National Thanksgiving Day.” The observance of special days has a Reformed tradition which can be traced back to the church order adopted by the great Synod of Dordt, 1618-19. We realize that there are differences within the Reformed camp on this matter. Even sister churches of the PRC do not observe all...