https://www.gamespot.com/articles/fortnite-update-42-delayed-new-patch-time-announce/1100-6458944/

Update 2: Fortnite's new update, 4.2, is now due out on Wednesday. Server downtime will begin at 1 AM PT / 4 AM ET / 9 AM BST / 6 PM AET, although no estimate for its duration was shared. The new patch will be available once the servers are back online.

Update: The new Fortnite patch has been delayed due to Epic's discovery of an unspecified issues. Related to this, some quests might not work as expected, Epic said. That includes one of the Week 3 challenges.