Talk Like a Pirate Day
From Webcomic Wiki
September 19 is International Talk Like a Pirate Day, you scurvy dogs!!! Arr. Naturally this comes in an American version [1], A UK version [2], with some instructions from Making Light [3], and a wiki [4].
International Talk Like a Pirate day is considered by some to be a Webcomics Holiday, due to the outpouring of silly webcomics and derivative forum avatars. See forums.megatokyo.com for examples.
