Pick a good or bad one.
https://en.wikipedia.org/wiki/October_21
1512 – Martin Luther joins the theological faculty of the University of Wittenberg.
Quite a story surrounding this mans life:
https://en.wikipedia.org/wiki/Martin_Luther
1994 – North Korea nuclear weapons program: North Korea and the United States sign an Agreed Framework that requires North Korea to stop its nuclear weapons program and agree to inspections.
I'd like to say something sarcastic here, but it's been overdone.
1973 – Fred Dryer of the Los Angeles Rams (Fearsome Foursome) becomes the first player in NFL history to score two safeties in the same game.
I watch that game on TV, and didn't realize at that time how great that feat was. After all, how many defensive ends even score one safety in their career ?
Ionically, he's probably best known for his role as "Hunter".
I left the one on North Korea out for you as that one really stood out!
1994, man that's 24 years ago.
Martin Luther is most known as sort of the father of the Protestant Reformation:
https://www.britannica.com/event/Reformation
The Catholic Church, years later responded with the Counter-Reformation that was started in a great part with the Council of Trent.
The world is so very different today than it was back then.