From the support page:
On June 24th, 2024 we will be performing necessary datacenter maintenance which will affect most Blizzard games and services. While this maintenance is primarily focused on Battle.net infastructure in the Americas region, we anticipate that there will be disruptions across multiple global services such as logins, account management, and the Battle.net shop.
Players in games that are not fully brought offline may experience limited features / services such as: matchmaking, starting new multiplayer games, completing in-game purchases.
Maintenance Start Time: 6:30 AM PDT
Maintenance End Time: 10:00 AM PDT
