Last year when we worked out in the office that I was old enough to be the mother of most of the other people in my team, and in two cases their grandmother.
I had something similar. I realised that I was old enough to be Younger Colleague's mum, and we all had a good laugh about it. Then an Even Younger Colleague started, young enough to YC's daughter.
It took about a week before they realised this made me old enough to be her GM. That was nearly 10 years ago, and EYC still calls me Gran from time to time!
I started to really feel old about 2 months ago. I've had arthritis for quite some time, but in the last couple of months it's got really bad. I can barely get up the stairs, my knees keep giving way and I have excruciating tendonitis in my Achilles tendon (both legs).
We went out to lunch with DP's son yesterday and had to park about 1/4 of a mile from the pub. The pavement pounding walk made my legs hurt so much that I was practically in tears on the way back and had to take to my bed when we got home.
We need a bloody stairlift, or a bungalow.
I still don't look old though. I'm nearly 64 and a lot of people think I'm in my 40s or early 50s. When it was my 60th, there was (apparently) a lot of debate about how the person organising a surprise must have got it wrong and it must have been my 50th.