National Heimlich Maneuver Day is observed annually on June 1, primarily in the United States. This day is dedicated to educating people about the Heimlich maneuver, a life-saving first aid technique designed to remove foreign objects from the airways to prevent choking. The maneuver, which involves a rescuer standing behind a choking victim and applying pressure to the diaphragm, was popularized by American thoracic surgeon Henry Heimlich in the 1970s. Initially, back slaps were the recommended method for addressing choking, but Heimlich's technique was shown to be more effective. Organizations such as the American Red Cross and the American Heart Association have historically endorsed the maneuver, although their recommendations have evolved over time. To celebrate, individuals are encouraged to learn how to perform the Heimlich maneuver properly, ideally through a certified first-aid class, rather than relying on online resources.