Hispanic Heritage Month runs September 15th through October 15th.
Why September 15th? Because five Latin countries celebrate the anniversaries of their independence on September 15th: Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua. Mexico and Chile celebrate their Independence Days on September 16th and 18th. For the month we celebrate those whose roots trace back to Spain, Mexico and Spanish-speaking nations of Central America, South America, and the Caribbean. Que bueno, eh?
Wondering how to celebrate? There's information at the United States Census Bureau and a great resource for teachers at TeacherVision for ideas on how to share Hispanic culture with your students. You could make a pinata, tell Puerto Rican folk tales, or maybe learn a little Spanish... using my bilingual titles to do it:
Soap, soap, soap ~ Jabón, jabón, jabón and Paco and the Giant Chile Plant ~ Paco y la planta de chile gigante.