aHUS Awareness Day is observed worldwide every year on September 24. This day is dedicated to raising awareness about atypical Hemolytic Uremic Syndrome (aHUS), a rare and serious condition that affects the kidneys and blood vessels. Various organizations and advocacy groups participate in activities aimed at educating the public and supporting those affected by the disease. Events may include informational campaigns, social media outreach, and community gatherings to foster understanding and support for individuals living with aHUS. The observance of this day highlights the importance of research, treatment options, and the need for better recognition of the condition.