title: American Enlightenment
context: The American Enlightenment was a period of intellectual ferment in the thirteen American colonies in the 17th to 18th century, which led to the American Revolution, and the creation of the United States of America.  The American Enlightenment was influenced by the 17th-century European Enlightenment and its own native American philosophy.  According to James MacGregor Burns, the spirit of the American Enlightenment was to give Enlightenment ideals a practical, useful form in the life of the nation and its people.[1]
question: When did the Enlightenment spread to America?
answers: 17th to 18th century