Last Monday, July 21st, many European realms apparently underwent thirteen hours of additional maintenance. Players were understandably upset. Blizzard understands this too, which is why they're giving players with characters on any of those realms a one-day playtime credit, like they do. The battlegroups Cyclone, Nightfall, Conviction, Ruin, and Rampage were affected, which is to say the following realms:
Anachronos, Balnazzar, Blade's Edge, Bloodfeather, Bronze Dragonflight, Burning Steppes, Darkmoon Faire, Darksorrow, Darkspear, Defias Brotherhood, Earthen Ring, Frostwhisper, Genjuros, Hakkar, Haomarush, Hellscream, Kor'gall, Laughing Skull, Lightbringer, Lightning's Blade, Magtheridon, Molten Core, Neptulon, Nordrassil, Quel'Thalas, Ragnaros, Ravencrest, Runetotem, Scarshield Legion, Shadow Moon, Shadowsong, Shattered Hand, Silvermoon, Skullcrusher, Spinebreaker, Steamwheedle Cartel, Stormrage, Stormreaver, Stormscale, Sylvanas, Terenas, The Maelstrom, The Venture Co., Thunderhorn, Turalyon, Twisting Nether, Vashj, and Xavius
Anyone with an active account and a character on any of those realms will get a free day. That must have been some technical difficulty, since well over half the English-speaking European realms are on that list. Enjoy your playtime credit, my friends across the Atlantic.