Progess means updating legal and cultural definitions. What do you think happened with gender and marriage?

Excellent point. I too fetishize “progress”, which is why at my most recent birthday I progressed from 25 to 900.

That isn’t to say I was born in or even alive in the year 1118 AD. But I’m 900 just the same because I feel like it.

Time is relative though. (admittedly for these purposes it makes little difference, but I presume the question of age should be assumed to be from your reference frame, how many revolutions of the sun (Sol) around Earth have you been alive for.

Of course, it's from society's reference, not your own, that you know when you were born, and how many revolutions have happened since then.

And observing revolutions feels like an abstraction to most people, kind of like "seeing" chromosomes. Most people see effects of revolutions (seasons).

Sure, time is relative. It’s also how we calculate standard measures (the distance light travels over some interval). So if time is relative, so is length.

Correct. That gives me another idea of something I would like changed... for my dating prospects...