https://www.gamespot.com/articles/fortnite-downtime-scheduled-ahead-of-season-4-upda/1100-6458606/

Season 4 of Fortnite: Battle Royale is just around the corner. Epic is kicking off the next season of its popular battle royale game on PS4, Xbox One, PC, and mobile tomorrow, May 1, which will be preceded by a period of downtime as the developer deploys the title's latest update.

As with previous weekly patches, servers will be taken offline in the early hours of the morning to prepare the game for the Season 4 update. Epic hasn't specified how long servers will remain down, but on Twitter the developer announced the maintenance period begins on May 1 at 1 AM PT / 4 AM ET / 8 AM GMT.