No, it's not my sore ankle, stiff knee or slow pace. It's not my having to go to the bathroom frequently. And of course, during the night.
But no... it's not of these things I speak but of the random things I hear during the day -- for example, last week, I heard it would have been Gerald Ford's 100th birthday. THAT made me feel old.
Today I heard there's some sitcom coming in the fall that is set in that long ago era called the 1980s. Really? We're nostalgic about the 80s now? And then I think, yeah that was 30+ years ago. It's like what the 1950s were to us in the 1980s. Yes, I'm feeling old.