World Pneumothorax Day is observed worldwide on June 24 and aims to educate the public about pneumothorax, a potentially life-threatening condition commonly known as a "collapsed lung." This day highlights the medical condition where air escapes into the pleural cavity, leading to lung collapse, with symptoms including shortness of breath and chest pain. Various organizations, such as the BHD Foundation and the European Respiratory Society, promote this awareness day, although some, like the LAM Foundation, observe it on June 30. The event encourages discussions about the three main types of pneumothorax—primary spontaneous, secondary spontaneous, and traumatic—and their respective causes, symptoms, and treatments. Through this observance, individuals are informed about the importance of proper diagnosis and management of this serious health issue.