September holds special significance for both California and Mexico. On September 9, 1850, California was admitted to the Union as a free state under the Compromise of 1850. September also marks the beginning of Hispanic Heritage Month, observed from September 15 to October 15 in recognition of the independence anniversaries of five Latin American countries. This year, we encourage educators to highlight Mexico, which celebrates its independence on September 16. Mexico’s eleven-year War of Independence from Spain began on September 16, 1810, and ended on September 27, 1821.