"International Talk Like a Pirate Day is a parodic holiday created in 1995 by John Baur (Ol' Chumbucket) and Mark Summers (Cap'n Slappy), of Albany, Oregon, U.S., who proclaimed September 19 each year as the day when everyone in the world should talk like a pirate. An observer of this holiday would greet friends not with "Hello, everyone!" but with "Ahoy, maties!" or "Ahoy, me hearties!" The holiday, and its observance, springs from a romanticized view of the Golden Age of Piracy."
- source: Wikipedia