19th May 1962: Marilyn Monroe sings “Happy Birthday, Mr. President” to President John F. Kennedy

Kennedy joked that he could ‘retire after having had “Happy Birthday” sung to me in such a sweet, wholesome way.’

31st March 1985: WrestleMania I takes place at Madison Square Garden in New York City

WrestleMania grossed a reported $12 million and, although reviews of the first event were mixed, it marked the start of the longest-running professional wrestling competition in history.