Good news for all Wrath of the Lich King players. Since tonight you get 50% more experience points again!
The roads in Northrend are icy and fraught with danger. To help you continue your journey, players will get the benefit of the Joyous Journeys experience buff*, which will increase experience gains by 50% for all players through level 80! It’s a great time to finish leveling a character, create a new one, or invite friends to join you in your adventures.
Players can also visit any innkeeper in the capital cities and Dalaran to turn the experience buff off or on. The Joyous Journey’s experience buff will be available during the Ice Crown Citadel content update and until further notice.
Quelle: worldofwarcraft.com