You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did the 4th of july become an official holiday?" whose answer is 1870.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the 4th of july become an official holiday
Useful Output:

Doc 1: "The Second Day of July 1776, will be the most memorable Epocha, in the History of America. I am apt to believe that it will be celebrated, by succeeding
Doc 2: While it's only been a paid federal holiday since 1938, the Fourth of July has been celebrated by Americans stretching back to that first momentous day in
Doc 3: The holiday commemorates the Founding Fathers' declaration of independence in 1776. The day has had a fascinating history ever since, rife with
Doc 4: In 1938, it became a paid national holiday across the whole country. Now, Independence Day in the US is celebrated as the birth date of the
Doc 5: In 1870, the U.S. Congress made July 4th an official holiday. FILE - Boys on bikes