USA HISTORY

Detailed explanation-1: -On November 1, 2007, the United Nations (UN) called for one day each year to be designated as World Autism Day. On December 18, 2007, the UN General Assembly designated April 2 as World Autism Awareness Day. It was first observed in 2008.

Detailed explanation-2: -Many people begin their April with April Fools’ Day. World Autism Awareness Day, Earth Day, and Arbor Day also occur in April. What are some observances in April? In the United States, April celebrates the outdoors with National Garden Month, Keep America Beautiful Month, and National Wildlife Week.