Sometimes for a brief moment or two, usually when I'm in the car, I go blank on which season we're in. There's really not much of a pattern for when this happens but of course not if it's snowing or sweltering, but it's usually a mild day. Momentarily I'll sort of panic and wonder if it's getting ready to be winter or summer, and if I need to do something to get the car ready for it. This is similar to waking up and wondering what day it is, so you know what to expect.
I've done this for many years, so it's not an old age kind of thing - just a Bernice one.