What is the exact date of Jackie Robinson's MLB debut?

Jackie Robinson made his Major League Baseball debut on April 15, 1947. He started at first base for the Brooklyn Dodgers against the Boston Braves at Ebbets Field.

Robinson went hitless in three at-bats, but he reached base on a throwing error and scored the winning run in Brooklyn's 5–3 victory. His appearance ended the modern major-league color line, making him the first Black player in MLB since Moses Fleetwood Walker played in the 1880s.

The date is often confused with April 11, when Robinson appeared in a Dodgers exhibition game against the New York Yankees. April 15 was his regular-season debut, and MLB now observes that date as Jackie Robinson Day, with players wearing his number 42.