The United Nations designated April 2, 2008, as World Autism Day to raise awareness of the need to improve education, career opportunities, and community services and supports for Autistic individuals. Public attention had been drawn to the issue in 2006 when The Autism Acceptance Project presented a series of lectures, exhibitions and events titled The Joy of Autism: Redefining Ability And Quality of Life.

In April 2009, U.N. Secretary-General Ban Ki-moon proclaimed, “I welcome this growing international chorus of voices calling for action to enable children and persons with autism to lead full and meaningful lives. This is not a far-off dream; it is a reality that can be attained by promoting positive perceptions about autism as well as a greater social understanding.”

More info links here