The 5th Anniversary Party was a party in Club Penguin. It was supposed to be one day only, but started a day early, and ended a day late. It was also first confirmed in a post of the What's New Blog.
Strangely, the Party continued on October 25, 2010. It seems the only difference on that day was the exterior look of the Coffee Shop. It was changed back to normal but the Party was still going on inside.
On October 26, The Party Music was still playing even though the Party had ended.
Strangely, the music is different than the previous Anniversary Parties.
Unlike the 3rd and 4th Anniversary Parties, there wasn't a special pin released for the 5th year anniversary.
This anniversary party's party hat mostly contains traffic light colors (red, orange (amber), green (dark green or aqua).
It was the only Anniversary Party To Have All The Party Hats In The Wall (the Party Hat and the first four Party Hats)