https://www.gamespot.com/articles/fortnites-challenges-are-about-to-get-much-more-ma/1100-6459189/

For Season 4 Battle Pass owners, Tuesdays are an exciting day in Fortnite. A new set of weekly challenges is released, and although you have the full season to complete them, players are eager to get them done and earn new rewards. That process is about to become a more pleasant one, thanks to one of several new quality-of-life changes coming soon.