World Sepsis Day is observed worldwide every September 13. Launched in 2012 by the Global Sepsis Alliance, this international campaign aims to unite people in the fight against sepsis, a potentially life-threatening condition that results from the body's response to infection. The day is supported by over 7,000 organizations and healthcare facilities globally. Activities typically include educational events, discussions on sepsis management and prevention, and social media campaigns using the hashtags #WorldSepsisDay and #WSD. The initiative highlights the urgency of early diagnosis and treatment of sepsis, which affects 47 to 50 million people annually and causes at least 11 million deaths each year.