When I was 17, I was with a group of high school students touring Germany, Switzerland, Austria and Czechoslovakia, and at the start of July, I was staying for a few days with a family in Kindenheim, a village in Rheinpfalz near Ludwigshafen. Incidentally, Bobenheim am Berg, where Donald Trump's great great grandfather was born is about nine miles away, and Kallstadt, where they settled before moving to the US is about the same distance.
On July 4, I told them that this day was Unabhängigkeitstag (Independence Day). I explained to them its significance and described how we celebrate it with fireworks.