Guinness has successfully started "Arthur's Day" in Ireland, the 29th of September when you're supposed to have a drink of Guinness to celebrate Arthur Guinness

Guinness has successfully started "Arthur's Day" in Ireland, the 29th of September when you're supposed to have a drink of Guinness to celebrate Arthur Guinness' birthday. (It's not like they need it, Diageo (the company that make guinness) have 50% of the Irish alcholic beverage market, but shrug)