FDC made in the Soviet Union, 1983. The text on the envelope reads:”March 8″, wich is International Woman’s Day. After the Socialist Party of America organized a Women’s Day on February 28, 1909, in New York, German revolutionary Clara Zetkin proposed at the 1910 International Socialist Woman’s Conference that 8 March be honored as a day annually in memory of working women.
The day has been celebrated as International Women’s Day or International Working Women’s Day ever since. In 1917, March 8 became a national holiday in the USSR.
The day was mostly celebrated by the socialists movements and communist countries until it was adopted by the feminist movement in about 1967. The United Nations began celebrating the day in 1975.