A useful guide starts with clear sourcing
NationalChiliDay.com is an independent guide to the food observance, chili’s history, and ways to take part. We are separate from the competition organisers and food brands linked on these pages.
We aim to make the practical facts easy to find and the historical claims easy to trace. This page records the sources used in the current guide. It is not a claim that every origin story has been settled.
Sources behind the guide
The annual date rule
National Day Calendar identifies the observance as the fourth Thursday of February. Upcoming dates on this site are calculated from that weekday rule.
National Day Calendar: National Chili Day ↗San Antonio’s Chili Queens
The Smithsonian’s National Museum of the American Latino discusses the vendors and the limitations of the surviving historical record.
Smithsonian: Chili Queens and Fiesta Gowns ↗Texas’s state dish
The Texas State Library lists chili’s 1977 designation and the legislative resolution. Its Lone Star Menu exhibit also provides context for cook-off history.
Texas State Library: State Symbols ↗
Texas State Library: Lone Star Menu ↗A presidential food document
The National Archives preserves a Pedernales River Chili recipe and discusses Johnson-era food traditions.
National Archives: historical recipe ↗
National Archives: What’s Cooking, Uncle Sam? ↗Competition categories and events
The International Chili Society’s own pages describe its categories and provide its event and recipe directories.
ICS: cooking categories ↗
ICS: event directory ↗The Terlingua championship tradition
CASI describes its connection to the 1967 Terlingua championship and its continuing competition activities.
CASI: organisational history ↗
CASI: Terlingua championship ↗Context for an origin legend
The Texas State Historical Association’s biography of María de Jesús de Ágreda provides historical context for the religious tradition surrounding her. The chili-recipe story remains a legend, not an established first recipe.
TSHA: María de Jesús de Ágreda ↗
How we handle the material
Separate dates, history, and legend
A holiday rule, a historical record, and an origin legend are different kinds of information. Where a founder or first inventor has not been established, we say so. We do not use the history of the dish to invent a founding date for the observance.
Link to the organisation responsible
For cook-offs, we direct readers to the organiser for current dates, eligibility, fees, and event changes. Recipe quantities and methods remain with their original publisher. We do not describe linked recipes as tested in our own kitchen.
Be clear about imagery
The lead food image is AI-generated. It is an illustrative bowl of chili, not a photograph of a named recipe, a competition entry, or an actual event. It should not be used as documentary evidence for those subjects.
Keep review dates meaningful
The displayed source-review date is November 4, 2026. Calendar dates are calculated automatically from the annual rule; that calculation does not imply a new review of external event details. External pages can change after our review.
Contact and corrections
If you spot an error, send the page address, the statement in question, and a source that helps us check it. We welcome precise corrections, particularly when an external organiser has changed its information.
For a concise date summary, visit the reference section on the homepage. For historical reporting, follow the institutional documents linked above and distinguish their evidence from this guide’s summaries.