Your child will not remember your life. They will remember eras of you. The dad of the small apartment. The mom of the year she was sad. The father who drove the silver car. The mother who went back to school. To you, your life is continuous — one long thread of being yourself with these kids. To them, you arrive in chapters, each one its own complete world, edges soft, middles vivid, the whole thing sealed off from what came before and after by a wall of forgetting that is mostly invisible to them and entirely invisible to you.

This is how autobiographical memory works in children. Early episodic memory consolidates around the age of four, sometimes earlier, sometimes later, and what gets retained is not the truth of your parenting but the texture of a period. The smell of the house. The shape of a routine. Who came over on Sundays. What the kitchen looked like at breakfast. Whether you seemed happy or tired or angry. Your child is not a journalist taking notes on you. They are a poet, absorbing atmosphere.

The eras are usually marked by something external — a move, a sibling, a school change, a divorce, a job loss, a death, a new house. The external change is the bookmark; the inside of the era is the actual memory. Within each era, certain images become canonical. Your daughter at thirty will not remember the seven hundred bedtimes you did between ages four and seven. She will remember one. The one where the window was open and you sang the wrong song. That night will represent the whole era to her, and you will not be able to predict which night it was. You were not paying attention. You were tired. It was Tuesday.

This has a brutal implication and a tender one. The brutal: your worst moments inside an era are more likely to be remembered than your average moments, because affect is what cements episodic memory. The tender: your best moments inside an era are also more likely to be remembered, for the same reason. The middle gets composted into the felt sense — was that a good era or a hard one — and only the peaks survive as scenes. So the work is not to engineer every day. The work is to make sure the era as a whole has a temperature your child can survive remembering.

The eras also have you in them at different ages. Your child will remember you as the parent of twenty-eight, then the parent of thirty-five, then the parent of forty-two, and these will feel to them like different people. You will know they are the same person. They will not. They will say things like, "You were so different when I was little," and you will want to say, "I was the same, I was always me," but you will be wrong. You were different. The era held a different version of you, and that version is who they have on file.

Knowing this changes how you parent without changing what you do. You start to notice when an era is ending. You start to notice the bookmarks as they happen. You start to think, this is the last summer in this house, this is the last year before the baby comes, this is the era of the morning walks before she starts walking herself. You stop pretending that the continuity you feel is the continuity they will inherit. You begin to write, in small ways, into the era — not into the day. You ask, what do I want this period to feel like, from the inside, when she looks back? And you make small choices in that direction.

You also become gentler with yourself about the hard eras. The year you were depressed. The year your marriage almost ended. The year you worked too much. You start to understand that this is one chapter, not the whole book, and that what your child will carry from it is one image, one feeling, one scene — and that you still get to shape what that scene is. You can sit on the edge of their bed even in the hard era. You can apologize. You can be honest. You can plant one good night inside a bad year, and that night may be the one that survives.

And you accept the asymmetry. You will remember your child's whole childhood. They will remember you in pieces. That is not a failure of love on their part. That is how minds work. The love is in the eras themselves, and the eras live on in them whether they can name them or not.