Universalist, Unitarian, & Unitarian Universalist Milestones
- Annie Adams Fields (6 June 6, 1834, Boston, Massachusets – 5 January 1815) Writer, Philanthropist, Social Reformer
- Charles Sinclair Weeks (15 June 1893, Newton, Massachusetts – 7 February 1972 Concord, Massachusetts) United States Secretary of Commerce, Senator, Mayor, Businessman
- Anna Laetitia Aiken Barbauld (20 June 1743, United Kingdom – 9 March 1825, Stoke Newington, United Kingdom) Poet, Literary Critic, Essayist, Editor
- Harold Hitz Burton (22 June 1888, Jamaica Plain, Massachusetts – 28 October 1964, Washington, District Of Columbia) US Supreme Court Justice, Senator, Mayor
- Norman Cousins (24 June 1912 West Hoboken, New Jersey – 30 November 1990, Los Angeles, California) Editor, Author, Peace Activist, Professor
- Celia Laighton Thaxter (29 June 1835 Portsmouth, New Hampshire – 25 August 1894, Appledore Island, Maine) Poet, Author
In U/U/UU History
- Unitarian Universalists adopted seven unifying Principles, on June 21, 1985.
- On June 25, 1863, Olympia Brown became the first woman to be ordained by any denomination in the United States. She was ordained as a Universalist minister.