1st » Tulsa Race Riot: civil unrest in Tulsa, Oklahoma.
6th » Southwark Bridge in London is opened to traffic by King George V and Mary of Teck known as Queen Mary.
20th » Workers of Buckingham and Carnatic Mills in the city of Chennai, India, begin a 1921 Buckingham and Carnatic Mills Strike or four-month strike.
28th » Serbian King Alexander I of Serbia known as Alexander I proclaimed the new constitution of the Kingdom of Serbs, Croats and Slovenes, known thereafter as the Vidovdan Constitution.
30th » U.S. President Warren G. Harding appoints former President William Howard Taft Chief Justice of the United States.
Famous Birthdays on June in 1921
1st » Nelson Riddle, American composer and bandleader (d. 1985)
2nd » Betty Freeman, American photographer and philanthropist (d. 2009)
2nd » Sigmund Sternberg, Hungarian-English businessman and philanthropist
2nd » András József Szennay, Hungarian clergyman (d. 2012)
3rd » Forbes Carlile, Australian pentathlete and coach