https://www.pcgamesn.com/fortnite-season-5-week-4-challenges-release-times
Here are the Fortnite week 4 challenges release times
Aug 2, 2018 - When do the Fortnite week 4 challenges unlock? You can start completing the new challenges very soon
week 4 challengesfortnitereleasetimes
https://www.inverse.com/article/44554-fortnite-season-4-week-2-challenges-leaked
Leaked 'Fortnite' Season 4 Week 2 Challenges Have Players On the Hunt Again