|April Fools' Party|
|When||April 1, 2013|
|Previous Party||Puffle Party 2013|
|Next Party||Spring Dance|
The April Fools' Party was a party on CPYS that took place on April 1, 2013 to celebrate April Fools, a holiday known for practical jokes.
In order to activate the upside-down town, players could use the command !APF, in order to do so. The party lasted for about seven hours in-game with no prior announcement or custom items made for the party in a similar fashion to the St. Patrick's Day Celebration.
- Mascot Rookie came online during the party.
- The April Fools' Party took place on April 1, 2013 during the Puffle Party. Players could use the command !APF to activate the upside-down Town on that day only.