Wikipedia:Selected anniversaries/June 9
June 9: St. Colmcille's Day in Ireland
- 68 - Roman Emperor Nero committed suicide after he was deposed by the Senate.
- 1815 - Congress of Vienna ended, redrawing the political map of Europe after the defeat of Napoleon.
- 1885 - The end of the Franco-Chinese War. China gave up Tonkin and Annam (most of present day Vietnam).
- 1934 - Donald Duck debuted in The Wise Little Hen.
- 1986 - The Rogers Commission released its report on the Space Shuttle Challenger disaster.