![It happened on a… April 18](https://cdn.buminteractif.com/2020/05/5d09259d9d1ed.jpg)
2020
Canada’s worst modern mass shooting as a gunman kills 18 people, including a Royal Canadian Mounted Police officer, across Nova Scotia.
![](https://cdn.buminteractif.com/2021/04/Nova-Scotia-mass-shooting-1200x675.jpg)
2017
Portuguese superstar Cristiano Ronaldo becomes first player to score 100 goals in the Champions League with a hat-trick in Real Madrid’s 4-2 win over Bayern Munich.
![](https://cdn.buminteractif.com/2020/05/5d09259d9d1ed-1200x800.jpg)
1999
Wayne Gretzky (New York Rangers) played his final game in the NHL. He retired as the NHL’s all-time leading scorer and holder of 61 individual records.
![](https://cdn.buminteractif.com/2017/12/5a3c5c99d6891-1200x675.jpg)
1995
![](https://cdn.buminteractif.com/2021/04/Joe-Montana-1200x675.jpg)
1975
John Lennon releases single “Stand by Me”.
![](https://cdn.buminteractif.com/2020/10/coverimages1195370-1200x675.jpg)
1956
1946
Jackie Robinson has four hits, including a three-run homer, as the Montreal Royals beat Jersey 14-1; first black man to play in professional baseball’s all-white leagues.
![](https://cdn.buminteractif.com/1946/04/Jackie-Robinson_Montreal-1200x675.jpg)
1938
Superman, the world’s first super hero, appeared in the first issue of Action Comics. The cover date was June 1938.
![](https://cdn.buminteractif.com/1938/06/dd055f53a45702fe05e449c30ac80df9-1200x675.jpg)
1923
Yankee Stadium opened in the Bronx, NY. The Yankees beat the Boston Red Sox 4-1. John Phillip Sousa’s band played the National Anthem.
![](https://cdn.buminteractif.com/1923/04/coverimages23892526-1200x675.jpg)
1906
![](https://cdn.buminteractif.com/2021/04/coverimages24780513-1200x675.jpg)
1506
The cornerstone of the current St. Peter’s Basilica is laid in the Vatican by Pope Julius II.
![](https://cdn.buminteractif.com/2020/08/5f3467749bc0d-1200x675.jpg)