International Disorders of the Corpus Callosum Day, also known as World Disorders of the Corpus Callosum Day, is observed worldwide every July 2. Established to highlight disorders affecting the corpus callosum, the day aims to promote understanding of conditions that disrupt communication between the brain's hemispheres. These disorders include agenesis, hypogenesis, hypoplasia, and dysgenesis, which can lead to a range of symptoms such as learning difficulties and motor coordination problems. The date was chosen because it represents the middle of the year, symbolizing the central location of the corpus callosum in the brain. Since its inception in 2015, the day has garnered support from various advocacy organizations, including NODCC in the United States, Corpal in the United Kingdom, and AusDoCC in Australia. Activities on this day focus on increasing knowledge about these rare disorders and enhancing research efforts for better diagnosis and patient care.