- April 25, 1959 – At the invitation of the Law School Forum, Cuban Premier Fidel Castro speaks before a crowd of more than 7,000 at Soldiers Field. Introduced by FAS Dean McGeorge Bundy, Castro speaks in English, with periodic assistance from Public Relations Ambassador Teresa Casuso. Earlier at noon, Castro and an entourage of 50 dine at the Faculty Club.
- April 28-30, 1959 – In Sanders Theatre, Puerto Rican Gov. Luis Muñoz Marín delivers three Godkin Lectures on the general topic of “Nationalism and Its Effect on World Tensions.” The lectures are also broadcast by WGBH-TV.
- April 1962 – On the ground floor of Dunster St. on the Mount Auburn side of Holyoke Center, the Harvard Information Center opens, with a Harvard University Press display room on the mezzanine.
- April 1963 – Students at the Colleges and at the Law, Divinity, and Business schools join forces to raise $2,000 to help the financially strapped Student Nonviolent Coordinating Committee (SNCC) continue its voter-registration efforts among the blacks of Greenwood, Miss.
- April 27, 1972 – At the annual Research Banquet of the School of Dental Medicine, UCLA Anatomy and Oral Biology Professor Reidar F. Sognnaes describes his discovery of potentially definitive X-ray evidence for Adolf Hitler’s death.
– From the Harvard Historical Calendar