National Keto Day is observed worldwide every January 5 to celebrate the ketogenic diet and its health benefits. Established in 2019 by The Vitamin Shoppe, this day highlights the diet's origins in the 1920s for treating epilepsy in children. The ketogenic diet is characterized by high-fat, low-carbohydrate consumption, promoting a metabolic state called ketosis, which can help lower seizure frequency. Participants celebrate by sharing photos of their favorite keto foods on social media using the hashtag #NationalKetoDay, trying new keto recipes, and hosting keto meals for friends and family. Additionally, individuals are encouraged to consult a doctor before starting the diet, as it may not be suitable for everyone. The holiday also aims to bust myths surrounding the keto diet and educate the public on its various health benefits.