https://www.gamespot.com/articles/fortnite-valentines-day-update-and-event-delayed-u/1100-6456792/

Fortnite developer Epic Games announced recently that it would launch a Valentine's Day event for its Save the World mode alongside a new update for PS4, Xbox One, and PC. Previously, Epic had delayed released of the patch until today--and now it has pushed it back again, meaning that the Valentine's Day event will begin after the holiday.

On Reddit today, Epic announced that players will have to wait another day for update 2.5.0. As a result, Save the World won't have a Valentine's Day makeover until tomorrow, if the schedule remains as announced.