Addison’s Disease Day is observed worldwide every May 29 to raise awareness of Addison's disease, a rare endocrine disorder affecting the adrenal glands. The day was established in 2019 by the Addison’s Disease Self-Help Group, a UK-based charity that supports individuals with Addison’s disease and adrenal insufficiency. The date was chosen to coincide with the birthday of U.S. President John F. Kennedy, who was diagnosed with the condition at age 30. Typical activities on this day include hosting events like Addison’s Afternoon Tea to educate others, fundraising for research, and sharing information on social media using the hashtag #AddisonsDiseaseDay. The observance aims to inform the public about the symptoms and treatment of Addison’s disease, which can include fatigue, weight loss, and severe adrenal crises requiring urgent medical attention.