The new Darkmoon Faire is filled with quirky details, fun games, and lots of vanity items for all tastes. Attractions include:

• Purchasable Replica Dungeon Tier--meaning you can transmogrify your armor into Dungeon Set 0 and .5 tier from vanilla (and without class restrictions too!). These sets had been removed in Cataclysm and were unobtainable for a while.
• Numerous new mounts and pets.
• A large-scale PvP arena bloodbath.
• New quests tied to mini-games as well as professions-related quests: completing these will grant Darkmoon Prize Ticket which can be used to purchase vanity items and transmogrification gear.
• A petting zoo!

Check out the 4.3 Darkmoon Faire Preview Guide for an in-depth look at all aspects of the Faire, from screenshots to explanations of all the new games.The Darkmoon Faire's usual schedule has it arriving on site on the first Friday of the month. For the weekend, the carnies will be seen setting up the midway, and the Faire will actually start early on the following Monday.