https://www.cnet.com/news/fortnites-birthday-celebration-live-everything-you-need-to-know/

Fortnite's birthday update patch is now live, with a new set of weekly challenges for the Battle Pass, a new submachine gun and the return of Playground Mode. But most importantly, the update brings birthday-themed skins, a Battle Bus strewn with streamers and birthday challenges you can complete even without a Battle Pass.

To celebrate the one-year anniversary of the game's release, Epic Games added three free challenges to unlock cosmetic items. The first two are pretty standard: Play 14 matches to complete the first challenge, then deal 1,000 damage to opponents to complete the second. But the third challenge is a little more unorthodox: You'll need to dance in front of 10 birthday cakes scattered around the island.