Woodstock. I was only 6 and didn't really know much about it until roughly 10 years later. I know Ancient Hippy was lucky enough to be there.
Oh, Didge, you just threw me a big old fat pitch right where I like 'em.
The Resurrection of Jesus Christ
(And no, I didn't miss the word "historical" in your question.)
All my old enemies 😝 gone.