Older brothers and many I've spoken to over the years mention 3 events-
Elvis, the Fab Four and Stones.
I can only imagine listening/seeing any of them like the rest of the world for the 1st time.
I'm not aware of any new music events that happened in the last 4-5 decades that can compare?
Oh well, the world has Beyonce, Hip Hop and the rest. Carry on.