I had my last day of school a few weeks ago. Uni next! ... well, a weird, foundation Art year first, but same difference. I dressed as a ninja on my last day. A very short ninja.
If you can afford it, take her to a new, modern restaurant (if you can find one) or cafe (cheaper) or perhaps on a night out where she can feel young again, perhaps doing simple things she enjoyed when she was younger? Heck, even if you share gossip with her and that sort of thing, it might make her feel as if she's in tune with youth again.
"Don't go in public naked" is a lesson that repeats itself in my dreams occasionally. I like to think that I've got that lesson pretty much under my belt now, but my brain apparently believes that I still need to pay more attention to it. The most terrifying nightmare related to this I ever had was when I dreamt I was outside, naked, and there were alien spaceships flying overhead with 'nudity detection beams'. I spent the entirety of my dream trying to hide under things.