National Singles Day recognizes 44.9% of U.S. adults (over 110 million people!) who are single, unmarried, divorced or widowed according to U.S. Census Bureau statistics released each yearin conjunction withNational Singles Week. Originally known as Unmarried and Single Americans Week, National Singles Week was established in the 1980's by the Buckeye Singles Council of Columbus, Ohio and is observed annually during the third week of September. National Singles Day is celebrated on the last day of National Singles Week!