National Oreo Day History
National Oreo Day celebrates one of the most famous cookies in the United States. The Oreo Cookie was first developed by the National Biscuit Company, which is today known as Nabisco. The date was 1912, produced in a factory in Manhattan, New York. According to Delish, Oreo is the world’s best-selling cookie. The observance is commemorated every year on March 6th.