I recently (is six months recent?) wrote about a poster I own. Yesterday I was watching “X-Men: Days of Future Past” and had to hit pause at around 39 minutes into it.
That same poster was on the wall of Quicksilver’s room. I only own 3 concert posters from that era, and that’s why I had to pause. One of the other posters was also on the wall!
Both are by Frank Bettencourt, and I got these images from his site. Both are promoting Santa Barbara’s Earl Warren Showgrounds concerts that happened in 1969.
That sure makes it seem like the X-Men story has them being in Santa Barbara in 1969 or soon after. Maybe that explains some of the weird stuff that was happening around then.