December 18 is the 352nd day in the Gregorian calendar. On this day, New Jersey became the third state to ratify the U.S. Constitution, the world's first communications satellitte, Project SCORE, was launched, and United Arab Emirates held its first-ever elections. Famous birthdays include Sia, Katie Holmes, and Brad Pitt. December 18 also marks Answer the Telephone Like Buddy The Elf Day and Arabic Language Day.