Prairies are one of the richest ecosystems on earth, and in North America they are a huge part of the landscape. Prairies provide homes to a variety of wildlife including bison, foxes, deer, rabbits, and many more. Due to human industrialisation, 170 million acres of prairie has been reduced to just 1% of its original form.

National Prairie Day is is observed on the first Saturday in June.

Christine Chiu of the Missouri Prairie Foundation founded this national holiday to educate the public about this vital ecosystem and to increase awareness and conservation efforts. The Registrar at National Day Calendar proclaimed National Prairie Day to be observed on the first Saturday in June annually.