...when the year you were born no longer appears on the drop down list of birth years at websites.
...when the baseball card you clothespinned to your bicycle spokes now sells for more than a grand.
...when you realize that you can either stay up late or get up early, but you can't do both anymore.
...when even your eyebrows start to go gray.
...when you begin to enjoy going to the bathroom.
...when the radio presets in your vehicle are all oldies, classical, NPR, or other talk radio stations.
...when you go see your doctor to follow up on one thing and talk about the two or three other things that are now wrong with your body.
Just a few observations.
How do YOU know you're getting old?