On October 24, for one day only, will be Club Penguins 4 year Anniversery! In case this is your first anniversery part, let me fill you in. There will be a big cake in the coffee shop, a brand new yearbook in the Book Room, and the famous party hats. Each year the party hats will have their own unique colors and will never be brought back.
In the newspaper, they have somewhat released the colors for the party hat. The colors are: Green, Yellow, & Blue. Now how do I know that? Look at the balloons:
Now here is a picture of what the hat will look like on somebodys player card: Thanks to Jmann93 for letting me use his head ;p