Update (1:10 AM PDT): All servers are online and open once again! Thank you everyone for your patience, and sorry about any inconvenience this may have caused.
Update (1:00 AM PDT): Bringing the servers back online right now. Currently estimate about 10 more minutes until all servers are back online.
Update (12:35 AM PDT): Maintenance work continues on schedule, no change in downtime estimate.
Update (12:05 AM PDT): Server maintenance and updates are underway. Current downtime estimate remains 1 hour.
We'll be taking all servers offline for about 1 hour tonight at midnight (6/23/2015 at 12 AM Pacific Time, 3 AM Eastern Time, 7 AM GMT, 10 AM MSK). This downtime is to perform regular scheduled maintenance and update buy and sell prices for NPCs in the Auction Houses.