- 1921 The Anglo-Irish conference (Treaty talks) opened in London.
- 1910 Henry McIlhenny, art collector and philanthropist who in 1979 donated his Donegal estate—which opened as Glenveagh National Park in 1984—to the Irish State, was born in Philadelphia.
- 1843 Daniel O’Connell’s campaign for repeal of the Act of Union was effectively terminated when his ‘monster meeting’ at Clontarf was banned.
