Portal:Germany/Anniversaries/April/April 9
- 1794 - Birth of Theobald Boehm, inventor of the modern flute
- 1886 - Death of poet Joseph Viktor von Scheffel
- 1936 - Death of sociologist Ferdinand Tönnies
- 1945 - Lutheran pastor Dietrich Bonhoeffer is hanged at Flossenbürg concentration camp
- 1945 - Georg Elser, who had attempted to kill Adolf Hitler, is executed at Dachau concentration camp