Wikipedia is a great resource full of encyclopedic information at our fingertips. As an open publication, it has all kinds of entries.
Today we find an extensive entry on September 19 - International Talk Like a Pirate Day. This is a parodic holiday created by pirate enthusiasts who proclaimed this a holiday in 1995. There are official acknowledgements of this occasion - the US states of Michigan and California are listed as having officially recognized it. Krispy Kreme gies out free doughnuts to people who talk and/or dress like pirates on this day, and Google search and Facebook both have the option to choose "Pirate" as a language choice.