Historical Events on May 9

14 significant historical events occurred on May 9. May 9 has seen several notable events throughout history. In 1917, it was the date of the Nivelle Offensive during World War I, a significant military event. On May 9, 1950, Robert Schuman made a declaration that later helped shape European economic integration. The date also hosted two Formula One Spanish Grand Prix races, occurring in 1993 and 2004.