It happened on… April 20

Expo ’92 opens in Seville, Spain.

The film “Annie Hall,” directed by Woody Allen and starring Woody Allen and Diane Keaton, is released. The film will win Best Picture at the 1978 Academy Awards.

Paul McCartney & Wings release the song “Band on the Run” in the United States.

Pierre Elliott Trudeau is sworn in at Rideau Hall as Canada’s 15th prime minister. He succeeds Lester B. Pearson.

Scientists Marie and Pierre Curie isolate a radioactive element—radium—for the first time.

Author Edgar Allan Poe writes his first detective story, “The Murders in the Rue Morgue,” published in Graham’s Magazine.

The first performance of William Shakespeare’s play “Macbeth” takes place at the Globe Theatre in London.