Where does the time go?

I guess I've been doing this for a long time!

It almost feels like it was taken yesterday, but I shot this image of Gillian and Linda many years ago at a family party. I was still at collage and we all were just a little younger!

I find it a bit scary then, that the next time I photographed these two cousins in the same frame, was 20 years later, in a family group at Linda's wedding.

Where does the time go?