U.S. federal holiday on July 4 Independence Day, known colloquially as the Fourth of July, is a federal holiday in the United States which commemorates the adoption of the Declaration of Independence on July 4, 1776, establishing the United States of America. 564,788 views on July 4, 2017 — Wikipedia's most-read article that day. Also most read: Eric Harris and Dylan Klebold, Stevie Ryan, Adrianne Curry, Mark Twain. Wiki link