Can America guarantee free expression of religion in public as an officially secular, but culturally Christian nation? Expressing religious faith in public is both protected by law and socially acceptable. As a secular nation, the US has no official religion, but since two-thirds of American are Christian, most of the displays of religion in public places we see represent one faith. For example, Christmas is the only religious holiday observed by the that’s also a federal holiday when all government services and most private businesses are closed. And some argue that, because of our history and founding, America was intended to be a Christian nation.