Every September, a pupusa shows up at a Los Angeles parade and chiles en nogada appears as a seasonal special in Chicago. It happens the same way every year, and most people eating either dish have no idea the two are connected, or that the U.S. government had anything to do with putting them on the same calendar.
Seven nations celebrate major independence anniversaries within the same four days every September. The 2026 Hispanic Heritage Month Facts for Features from the U.S. Census Bureau lays out why the calendar falls where it does. Sept. 15 is the independence anniversary of Costa Rica, El Salvador, Guatemala, Honduras and Nicaragua. Mexico’s Independence Day follows on Sept. 16. Chile’s Fiestas Patrias opens Sept. 18, marking the First Government Junta of 1810. Congress built Hispanic Heritage Month around those dates, and Public Law 100-402, signed in 1988, extended the observance to a full 31 days running through Oct. 15.
5 Countries, 1 Day, and a Lot to Eat
El Salvador’s pupusa is one of the oldest dishes on the calendar. Thick corn masa pressed by hand, stuffed with cheese, beans or pork, sealed and cooked on a comal until the outside crisps. It comes with curtido, a vinegary cabbage slaw, and it cannot be rushed. Joya de Cerén, a farming village buried under volcanic ash around 600 AD, confirms maize was central to food preparation there long before Spanish colonization.
Guatemala’s pepián goes back just as far. The Guatemalan government declared it Intangible Cultural Heritage of the Nation in 2007, a recognition earned by a rich stew built on toasted pumpkin seeds and dried chiles, nutty and smoky, served over chicken with rice and tortillas.
Honduras brings the baleada, a thick wheat-flour tortilla folded over refried red beans, crumbled queso seco and cream. One widely cited account puts its origin in La Ceiba in the 1960s, where a street vendor named Doña Tere sold folded flour tortillas alongside the railway serving Standard Fruit’s banana operations. A wheat-flour dish becoming one of Honduras’ most beloved foods in a country built on corn tortillas is its own kind of story.
According to a history recorded by Granada scholar Alejandro Barberena Pérez, María Luisa Cisneros Lacayo, known as La Loca, created Nicaragua’s vigorón around 1914 while selling food at baseball games in Granada, borrowing its name from a medicinal tonic advertisement. The dish is boiled yuca, crispy chicharrón and vinegar-dressed cabbage, served on a banana leaf and eaten by hand.
Costa Rica closes out the five with gallo pinto, rice and black beans so tied to national identity that both Costa Rica and Nicaragua claim to have invented it, a rivalry that has inspired competing attempts at the world’s largest serving, though both have regional variations.
Mexico’s Nuns, a General, and a Flag Made of Food
Mexico’s Sept. 16 has the most theatrical origin story of the group. The best-known account has Augustinian nuns at Puebla’s Convent of Santa Mónica preparing chiles en nogada for General Agustín de Iturbide in August 1821, roasted poblano peppers, fresh Castilla walnuts and pomegranate seeds assembled into a dish whose green, white and red echoed the colors of the newly independent nation’s flag. Historians note the documentary evidence is not conclusive, but the dish has stuck to September ever since, appearing on menus from July through September when the traditional seasonal ingredients are available.
Chile Slows the Whole Week Down
Chile’s Fiestas Patrias officially runs Sept. 18 and 19, but the celebration tends to take the whole week. Fondas, open-air canvas tents with wooden tables, dance floors and food stalls, go up across the country from the Atacama Desert to Patagonia. The classic empanada is baked, not fried, with flaky pastry filled with minced beef, onion, cumin, a hard-boiled egg, raisins and a single olive. Fondas also pour chicha, a fermented drink made from grapes in central Chile or apples in the south, while the cueca, Chile’s national courtship dance, plays all week.
The Food Was Always Tied to the Dates
Pupusas, pepián, vigorón and empanadas de pino were not designed for export. They were built for specific days and specific places, and the histories behind them go back centuries before any American observance existed. What’s changed is that American appetites caught up with the calendar. Birria has grown roughly 350% on U.S. restaurant menus over four years. The observance runs Sept. 15 through Oct. 15 because Congress made it so, but the food was telling this story long before anyone in Washington wrote it down.