It happened on… April 13

BTS becomes the first K-pop (Korean pop) group to perform on the American TV show “Saturday Night Live.”

“Avengers: Age of Ultron,” directed by Joss Whedon and starring Robert Downey Jr., Chris Evans, Chris Hemsworth, Scarlett Johansson, Mark Ruffalo, and Jeremy Renner, premieres in Los Angeles.

Pete Rose makes his debut with the Montreal Expos. He hits a double—his 4,000th hit—against his former team, the Philadelphia Phillies.

The Rolling Stones release “Brown Sugar,” their first recording on Rolling Stones Records. For the first time, the band uses the red tongue logo.

The Apollo 13 astronauts report, “OK, Houston, we have a problem here,” after an oxygen tank explodes while the rocket is en route to the Moon.

The Beatles record the song “Help.”

Sidney Poitier becomes the first Black actor to win the Oscar for Best Actor for “Lilies of the Field.”

George Frideric Handel’s oratorio “Messiah” is performed for the first time at the New Music Hall in Dublin.