What is the name of the annual MLB event honoring Jackie Robinson?

The annual MLB event honoring Jackie Robinson is called Jackie Robinson Day. Major League Baseball observes it every April 15, the anniversary of Robinson’s major-league debut with the Brooklyn Dodgers in 1947.

The first league-wide Jackie Robinson Day was held in 2004. The observance remembers Robinson’s role in breaking the modern baseball color barrier and celebrates his wider impact on American civil rights and sports. On the day, players, coaches, managers, and umpires traditionally wear Robinson’s number 42, which MLB retired across all teams in 1997.

April 15 was chosen because Robinson played his first regular-season major-league game on that date at Ebbets Field. He did not get a hit in his debut, but he reached base on an error and scored in Brooklyn’s 5–3 victory over the Boston Braves. The event is sometimes informally shortened to “Robinson Day,” but “Jackie Robinson Day” is the official and canonical name. It should not be confused with a separate holiday called “42 Day.”