April 9, 1939

Easter Sunday - Seventy years ago. Contralto Marian Anderson gave a free open-air concert before more than 75,000 people from the steps of the Lincoln Memorial in Washington after the Daughters of the American Revolution denied her use of Constitution Hall because of her race.

****In case you are too lazy to follow Stella's link in the comments -
Stella has left a new comment on your post "April 9, 1939":
You lit up my day with this one. Eleanor Roosevelt resigned from the DAR in protest of the way the organization discriminated against Anderson. Her resignation letter is brief and scathing. The Roosevelts were directly responsible for this historical performance. Thank you.