Time randomness

I was having a rather long conversation with one of my oldest friends today and I caught myself during the conversation thinking about dates in terms of before kids, after the first was born., before/after my middle was born, before/after the youngest was born , and I realized that is how I remember anything. Is it sad that the only means of remembering a timeline is based on the birth of my children? Probably but it's the best most accurate method I've got.