National Grain-Free Day is observed worldwide every February 21. This holiday was established in 2019 by Siete Family Foods, a Mexican-American food brand, to recognize and support individuals with dietary restrictions, particularly those who must follow a grain-free diet due to allergies or autoimmune diseases like celiac disease. On this day, participants are encouraged to forgo grains to understand the challenges faced by those with such dietary needs. The holiday aims to promote education about health conditions that necessitate a grain-free lifestyle and to encourage friends and family to accommodate these dietary restrictions. Typical customs include trying new grain-free recipes, cooking grain-free meals, and sharing information about grain-free alternatives to popular grain-based products. Participants often use hashtags like #NationalGrainFreeDay to spread the word about the observance.