Officially announced on the game and on an article on the Niantic site, Pokémon GO will indeed be under maintenance today June 1. You will no longer be able to play for a few hours while the developers update the application. This should allow an improvement of the game servers and probably the addition of future features.
Maintenance hours
- UK: 7pm to 2am (BST)
- Europe: 8pm to 3am (CEST)
- East Coast US: 2pm to 9pm (EDT)
- West Coast US: 11am to 6pm (PDT)
- Australia: 4am to 11am on Tuesday, June 2nd (AEST)
This is the first time since 2017 that Pokémon GO will be completely under maintenance! And Niantic reassures us "We apologize in advance for any inconvenience that this might cause. This will have no impact on your account."