In 2006, the United Nations established World Migratory Bird Day to be held on the second weekend of May every year. The event was founded as an effort of the UNís Agreement on the Conservation of African-Eurasian Migratory Waterbirds to raise awareness of the migratory linkages between regions of the globe. World Migratory Bird Day events have been held in 118 nations. Each year, the United Nations announces a uniting theme for official events.
The International Migratory Bird Day was created in 1993 by visionaries at the Smithsonian Migratory Bird Center and the Cornell Laboratory of Ornithology and is now being supported by the U.S. National Fish and Wildlife Foundation and U.S. Fish and Wildlife Service.
In 2019 World Migratory Bird Day in USA falls on May 12.