It happened on… September 23

The great Roger Federer plays his final tennis match at the Laver Cup in London. He ends his career with 20 Grand Slam titles.

Climate activist Greta Thunberg confronts world leaders with her “How dare you” speech during an environmental address at the United Nations in New York.

The TV series “Modern Family,” starring Ed Neill and Sofia Vergara, premieres on ABC.

Goaltender Manon Rhéaume becomes the first woman to play in the NHL while wearing the Tampa Bay Lightning uniform.

Canadian sprinter Ben Johnson wins the 100-meter dash at the Seoul Olympics. After being found guilty of doping, American Carl Lewis, who had finished second, is crowned Olympic champion.

Bob Marley performs his final concert at the Stanley Theatre in Pittsburgh.

The TV series “Marcus Welby, M.D.” premieres on ABC.

The first gassing takes place at the Auschwitz concentration camp.

General de Gaulle forms his government-in-exile in London.

Joseph Tremblay becomes the first Canadian to lose his life in World War I.

Frenchman Roland Garros became the first aviator to fly across the Mediterranean.

Gaston Leroux's novel The Phantom of the Opera is published.

Nintendo Koppai (later renamed Nintendo Company, Limited) is founded by Fusajiro Yamauchi. At the time, it produced playing cards.

The very first baseball team is formed: the New York Knickerbockers. The rules of the game are also adopted.