Registered Dietitian Nutritionist Day is observed worldwide every second Wednesday of March during National Nutrition Month. This day recognizes trained and credentialed food and nutrition experts who assess, diagnose, and treat dietary and nutritional issues. The day was established in 2008 by the Academy of Nutrition and Dietetics, which originally founded as the American Dietetic Association in 1917, aims to educate the public about the role of Registered Dietitian Nutritionists (RDNs) in healthcare, particularly in preventing chronic diseases. RDNs are distinguished from nutritionists, as the title "nutritionist" is unregulated in many areas, while "dietitian" requires accredited training and certification. RDNs work in various settings, including hospitals, community health programs, and private practice, providing medical nutrition therapy and developing dietary guidelines. The observance highlights the importance of certified professionals in promoting healthy living and contrasts them with untrained individuals who may use the title "nutritionist."