It's time to gnash your teeth, put on your best Long John Silver and let out a hearty "Arrr!" September 19 is 'International Talk Like a Pirate Day' (video below). Here is some history of this illustrious holiday from Wikipedia:
International Talk Like a Pirate Day (ITLAPD) is a parodic holiday created in 1995 by John Baur (Ol' Chumbucket) and Mark Summers (Cap'n Slappy), of Albany, Oregon, who proclaimed September 19 each year as the day when everyone in the world should talk like a pirate. For example, an observer of this holiday would greet friends not with "Hello," but with "Ahoy, matey!" The holiday, and its observance, springs from a romanticized view of the Golden Age of Piracy. It has also become an official holiday for members of the Church of the Flying Spaghetti Monster.
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At first an inside joke between two friends, the holiday gained exposure when John Baur and Mark Summers sent a letter about their invented holiday to the American syndicated humor columnist Dave Barry in 2002. Barry liked the idea and promoted the day. Growing media coverage of the holiday after Barry's column has ensured that this event is now celebrated internationally, and Baur and Summers now sell books and T-shirts on their website related to the theme. Part of the success for the global spread of the holiday has been attributed to non-restriction of the idea or trademarking, in effect opening the holiday for creativity and viral growth.