Nelson Mandela was inaugurated as South Africa's first black president on May 10, 1994, following the country's first multiracial elections.

On May 10, 1969, the first-ever 'Earth Day' was celebrated in the United States, marking a significant moment in the environmental movement.

The Cultural Revolution in China officially began on May 10, 1966, as Mao Zedong called for a campaign to purge capitalist influences from Chinese society.