Domino’s Pizza celebrates first Global Domino’s Day on Facebook.

Domino’s Pizza is celebrating its worldwide presence by throwing a global pizza party. On Dec. 8, customers in 19 countries will be able to join the international party with Domino’s by receiving an offer for 50 percent off any menu-priced pizza ordered online through a specialized Facebook tab.

Domino’s, which celebrates its 51st birthday this week, has stores in more than 70 international markets.

“Domino’s is proud of our global presence, and we greatly appreciate our customers around the world,” said Dennis Maloney, Domino’s Pizza vice president of multimedia marketing. “We’re excited to be able to unite our five million Domino’s Pizza Facebook fans, representing 19 different countries, with the same special offer.”