How do you remember the most significant moment of your life, if you have one.

If you have something you consider the most important single moment of your life, how do you remember it? Often people will say the birth of their children, but is it like watching the kid emerge or holding him/her the first time? Or more like a montage of the overall experience?

I got the autism, and I remember my moment specifically. It was about a second long. I remember exactly what I saw and exactly what I said to myself.

Just curious about the experience of others.