1791 – 1st US law school established at University of Pennsylvania.
1854 – 1st street-cleaning machine in US used in Philadelphia.
1902 – German agricultural tariffs are increased.
1933 – Baseball owners agree to ban Sunday doubleheaders until after June 15.
1938 – Groundbreaking begins for Jefferson Memorial in Washington, D.C.
1939 – “Gone With the Wind”, drama film directed by Victor Fleming and starring Clark Gable and Vivien Leigh, premieres in Atlanta (Best Picture 1940, inflation not adjusted highest-grossing film of all time)
1939 – 1st commercial manufacture of nylon yarn in Seaford, Delaware.
1941 – USS Swordfish becomes 1st US sub to sink a Japanese ship.
1942 – Massachusetts issues 1st US vehicular license plate tabs.
1944 – US Congress gives General Eisenhower his 5th star.
1952 – Christine Jorgenson is the first known American to undergo a sex-change operation.
1955 – “Folsom Prison Blues” single released by Johnny Cash (Billboard Song of the Year 1968)
1962 – Vaughn Meader’s “1st Family” album goes #1 & stays #1 for 12 weeks.
1973 – Pirates of Caribbean ride opens at Disneyland.
1979 – Chris Haney and Scott Abbott develop the board game Trivial Pursuit.
1992 – Arthur Ashe is named Sports Illustrated Sportsperson of the Year.
1997 – San Francisco 49ers retire Joe Montana’s #16.
2004 – “Million Dollar Baby”, directed by Clint Eastwood and starring Hilary Swank and Morgan Freeman is released (Best Picture 2005).
2009 – Boeing’s new 787 Dreamliner makes its maiden flight from Seattle, Washington.
2016 – White supremacist Dylann Roof is found guilty of the Charleston Church Massacre which killed 9.