https://www.gamespot.com/articles/pubg-pc-servers-going-down-for-maintenance-tonight/1100-6458676/

A major update is on the way to PlayerUnknown's Battlegrounds on PC. The patch is being deployed tonight, May 2, and will be preceded by a round of maintenance, during which time servers will be taken offline as developer PUBG Corp. rolls the new content out to the live game.

Update #12 arrives shortly after the end of PUBG's current ranked season, which formally concluded on May 1. Maintenance is scheduled to begin at 7 PM PT / 10 PM ET (3 AM BST on May 3) and is expected to last approximately four hours, although there is always a chance it may wrap up sooner or later than estimated.