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 a federal holiday?" whose answer is 1938.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the 4th of july become a federal holiday
Useful Output:

Doc 1: On August 2, 1776, when most delegates signed the Declaration of Independence, it became official. Unfortunately, Americans were getting good and bad news at
Doc 2: On July 4, 1776, the Continental Congress formally endorsed the Declaration of Independence. Celebrations began within days: parades and
Doc 3: 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 1776
Doc 4: The day was later signed into law on June 28, 1870, making it one of the oldest federal holidays. But why do we celebrate July 4 specifically,
Doc 5: In 1870, the U.S. Congress made July 4th a federal holiday; in 1941, the provision was expanded to grant a paid holiday to all federal employees