This is someting my friends have been into for years.

International Talk Like A Pirate Day:

International Talk Like a Pirate Day isn’t one o’ those governmentally sanctioned holidays that shifts around to create a convenient three-day weekend. No, the date is ALWAYS Sept. 19 (Cap’n Slappy’s ex-wife’s birthday.)

Though apparently the inventors were on Wife Swap (Chumbucket and Sally bio).