Don't get me wrong, ageing is a privilege, but it can still be a shock to realise you won't be young forever.
So, we want to know what moment in your life made you think: "man, I'm getting old."
Maybe it was when you realised that sitting down cross-legged meant having stiff legs for five minutes afterwards.
Or when your friend pointed out that you spend 99% of your free time knitting.
Perhaps it was when you saw someone returning home from a night out just as you were heading out for a morning run.
Whatever the moment was, we want to know what made you realise that you were getting older. Tell us in the comments and you could end up being featured in a BuzzFeed Community post or video.
Additional imagery from Getty Images