Global Handwashing Day is celebrated annually on October 15th to promote handwashing with soap at key times. Proper handwashing can help reduce the spread of diseases and save lives. The campaign aims to improve handwashing habits worldwide by raising awareness of its importance. Ignaz Semmelweis's discovery in 1846 that handwashing with chlorine reduced childbed fever mortality rates demonstrated hand cleansing can prevent infection. A Lifebuoy campaign in an Indian village significantly reduced diarrhea rates among children by encouraging more frequent handwashing.