Read and learn about history. Pick out a good one.
https://en.wikipedia.org/wiki/December_6
1884 – The Washington Monument in Washington, D.C., is completed.
1947 – The Everglades National Park in Florida is dedicated.
1973 – The Twenty-fifth Amendment: The United States House of Representatives votes 387–35 to confirm Gerald Ford as Vice President of the United States. (On November 27, the Senate confirmed him 92–3.)