World Autism Awareness Day is an internationally recognized day on 2 April every year, encouraging Member States of the United Nations to take measures to raise awareness about people with autistic spectrum disorders including autism and Asperger syndrome throughout the world.

World Autism Day is one of only seven official health-specific UN Days. The day itself brings individual autism organizations together all around the world to aid in things like research, diagnoses, treatment, and acceptance for those with a developmental path affected by autism.