You'll see some familiar features such as Snoogle's Presentation, Ale Goggles, and Beers for Brell, but they offer brand new rewards, so make sure you check them out. If you're a fan of crafting, you'll be happy to hear that Brewday will bring new craftables and supplies in addition to all the other treats.
So what are you waiting for, an invitation? (It's okay if you are, because you'll be receiving one in your in-game mail.) The event runs from March 11th until the 22nd, so check out the event page for the full story, and enjoy yourself!