On May 3, 1999, the U.S. Supreme Court ruled that the First Amendment does not protect a public employee's speech made pursuant to their official duties, significantly impacting free speech rights in the workplace.

The first-ever election for the position of mayor of London was held on May 3, 1979, leading to the election of the Conservative Party's candidate, which was a pivotal moment in British politics.

On May 3, 1969, the first ever 'Rolling Stone' magazine was published, marking a significant moment in music journalism and youth culture.