No, I don't think so. I believe instead that I am becoming more cynical about many things and special occasions are becoming less of a joy and more of a hassle when I get down to it. Back then it was special and bright yet now it feels jaded and worn.
Old age or cynicism?
A bit of both. Though to me it is mostly the lack of desire: I no longer want to do it. At this time I do just about anything I want to do, and I do many things which are productive mentally and physically, largely because I want to do them.
I am convinced that any of humankind who has the desire to achieve specific goals will achieve them ceteris paribus. I live alongside many examples. I am one of them. Still, I somehow no longer want to do Christmas and birthdays, simply because I have no desire for them at this point.
Someone once said to me "If you wait long enough, everything changes" and I have found this to be largely true.
So what will it be that may bring back the desire to celebrate milestones and traditional occasions? Why time, of course! Time for change and for healing and learning. Lots of time.
Who knows, maybe when I become old I'll start back really celebrating Christmas and birthdays instead of simply going through the motions as I seem to do these days, but I might be dead by then, so maybe I should enjoy it and embrace it while I have it. What is life after all without a bit of stimulation?
Oh, bah, humbug!