National Oreo Cookie Day

National Oreo Cookie Day, observed March 6th, marks the anniversary of the Oreo cookie's introduction by the National Biscuit Company, later known as Nabisco, on March 6, 1912. The cookie's now-iconic format, two chocolate wafers with a sweet cream filling sandwiched between them, has remained essentially unchanged in concept for over a century, even as the design of the embossed wafer pattern and the brand's flavor lineup have expanded dramatically. Oreo has since grown into the best-selling cookie brand in the United States and one of the best-selling cookie brands in the world, sold in more than 100 countries and offered in an enormous range of flavor variations and limited editions well beyond the original chocolate-and-cream combination. The cookie has also become a genuine subject of ongoing, if lighthearted, cultural debate, particularly the long-running question of whether to twist the cookie apart and eat the filling separately, dunk it whole in milk, or eat it straight, a divide the brand itself has leaned into through marketing over the decades. The exact origin of the name "Oreo" remains uncertain, with no definitively documented explanation despite various theories. On National Oreo Cookie Day, people celebrate by enjoying Oreos in their preferred style, whether twisted, dunked, or baked into another dessert.