Seán O'Casey, Irish dramatist, playwright, and memoirist (d. 1964)
Seán O'Casey (Irish: Seán Ó Cathasaigh [ˈʃaːn̪ˠ oː ˈkahəsˠiː]; born John Casey; 30 March 1880 – 18 September 1964) was an Irish dramatist and memoirist. A committed socialist, he was the first Irish playwright of note to write about the Dublin working classes.

1880Mar, 30
Seán O'Casey
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- 13Feb
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Thomas Edison observes the Edison effect. - 13May
Thomas Edison
In Menlo Park, New Jersey, Thomas Edison performs the first test of his electric railway. - 7Jun
Battle of Arica
War of the Pacific: The Battle of Arica, the assault and capture of Morro de Arica (Arica Cape), ends the Campaña del Desierto (Desert Campaign). - 28Jun
Ned Kelly
Australian bushranger Ned Kelly is captured at Glenrowan. - 11Nov
Ned Kelly
Australian bushranger Ned Kelly is hanged at Melbourne Gaol.