World Autism Awareness Day is a day to raise awareness, promote acceptance, and celebrate the unique strengths and experiences of autistic people. This day recognizes autism spectrum disorder (ASD), a developmental condition that causes difficulties in social communication and interaction. People on the autism spectrum experience the world differently, and these differences can affect how they communicate, behave, learn, and process sensory information. The United Nations has celebrated diversity and promoted the rights and well-being of persons with disabilities.