Wednesday morning downtime is a period between 5am and 11am CEST (Paris Time) on a Wednesday morning when Blizzard Entertainment takes down all of the European World of Warcraft realms for weekly maintenance. As a result, no one can play World of Warcraft between 5am and 11am CEST (or whatever the downtime period is) on a Wednesday in Europe. These times can vary and are often shorter like 6am and 9am CEST (Paris Time).