Hi Angelica! EPCOT has so many choices for making your birthday celebration special!
You didn't mention if this was a child or an adult, or how large your party is, so I'm going to give you some choices. You will want to call ahead for Advanced Dining Reservations at (407) WDW-DINE., or make it online
HERE.
For a large party, I recommend Teppan Edo in the Japan Pavilion, which is a Hibachi Grill experience. They can accommodate large groups, and the chefs have lots of fun and entertaining tricks up their sleeves!
For a more intimate party, I would recommend either Les Chefs de France (yum!) in the France Pavilion, or the San Angel Inn in the Mexico Pavilion. It has a very romantic a festive atmosphere, and your party can enjoy a lovely cruise down the river before or after your meal!
For a very festive atmosphere, I recommend Biergarten in the Germany Pavilion for a buffet, beer and entertainment!! It's Octoberfest year round!
For children, I would recommend a pizza party at Via Napoli in the Italy Pavilion. OR, you can dine with the characters at either Akershus Royal Banquet Hall in Norway, or the Garden Grill in The Land Pavilion.
For a Fine/Signature Dining Experience in EPCOT, I recommend either Le Cellier in the Canada Pavilion, known for its amazing steaks, or Bistro de Paris in the France Pavilion.
As for special touches for your celebration, click
HERE. This web page will describe how you can either order your celebration cake upon arrival at your table service restaurant, or you can order a custom bakery cake by calling at least 48 hours in advance: (407) 827-2253.