What is the X in X-mas?
religious organization in the United States formed in May 1961 by merger of the Universalist Church of America and the American Unitarian Association. The American Unitarian Association was founded in 1825 as the result of a gradual development of Unitarianism (the denial of the Trinity) within New England Congregationalism in the late 18th and early 19th centuries. The Universalist Church of America developed from an 18th-century movement in the eastern United States among those who believed in universal salvation. The first Universalist Church was formed in 1779, and in 1790 the Universalists adopted a doctrinal statement and plan for church government at a convention in Philadelphia