Special Days at Park List

I Know there are both official and unofficial days at some or all of the parks. For example Mickeys Very Merry Christmas which lasts about a month and a half, Mickeys not so scary Halloween also about a month are both well known official "day's". I believe both of those are at MK but might be celebrated at the other parks as well. Earth Day to celebrated at Epcot or AK? But there is also "Dapper day", and I don't think that's an official date for Disney. Is there an existing thread listing these unofficial dates? I think there are days like there's a autism day, military day, gay lesbian day.

1) What day are you aware of?
2) When is that day or days?
3) What park or parks are they celebrated?
4) Has it always been known as the third Thursday of X-month.
5) Does this an unofficial day have it's on the website?

On "military day" I expect there's a lot of shorthair and military attire. On "dapper day" I understand people dress up early turn-of-the-century attire. On Halloween kids dress up in costume but it's not encouraged to have adults in costume.

They celebrate "Talk Like a Pirate Day" whenever it falls in September. Among other things, I remember a pirate parade and Jake from the Neverland Pirates (who isn't normally at MK) meeting in Adventureland.

The Halloween and Christmas parties are held only in MK.

Just as an aside, it's also very much encouraged for adults to dress up for the Halloween parties too! That's one of the coolest parts about them.