It's that time of the year again - Talk like a pirate day! Wait that's no right let me try it again - Be rrrattlin' on like a pirrrate day! Here's how it got started from Wikipedia:
International Talk Like a Pirate Day (ITLAPD) is a parodic holiday invented in 1995 by John Baur ("Ol' Chumbucket") and Mark Summers ("Cap'n Slappy"), of the United States, who proclaimed September 19 each year as the day when everyone in the world should talk like a pirate.[1] For example, an observer of this holiday would greet friends not with "Hello", but with "Ahoy, me hearty!" The date was selected because it was the birthday of Summers's ex-wife and consequently would be easy for him to remember.
Not sure how a pirate sounds like? Try out a english-to-pirate-speak translator here or here.
The talklikeapirate site (link below) has more coverage like global pirate events, FAQ and more.
Edit: Video on Pirate speak
[Link: Wikipedia]
[Source: Original website]