September 9 Holidays

International Fetal Alcohol Spectrum Disorders Awareness Day is observed on 9/9 at 9:09 a.m. — the 9s representing the nine months of pregnancy — to raise awareness for FASD, the world’s leading preventable cause of intellectual disability, affecting an estimated 1 in 20 births in some communities. California Admission Day marks September 9, 1850, when California was admitted as the 31st U.S. state — a direct consequence of the Gold Rush that brought 300,000 migrants to the state in 18 months and made it one of the most economically consequential entries in American statehood history. Independence Day of Tajikistan marks September 9, 1991, when Tajikistan declared independence from the Soviet Union during its dissolution — the mountainous Central Asian republic that shares borders with Afghanistan, China, Kyrgyzstan, and Uzbekistan. International Sudoku Day celebrates the number-placement puzzle invented by Howard Garns in 1979 and popularized globally through Japanese puzzle publisher Nikoli. Nine nines, a Gold Rush, a Central Asian declaration, and a 9×9 grid.