@Hope4Now What counts as a huge gap in memory for childhood? I feel like I remember my life, and I can tell you certain things that happened, and roughly when they happened, but if I went year by year, I could tell you a tiny handful of one off events per year, and a general idea of what was happening that year, mostly a matter of what grade I was in, and a few memories of class. Several memories have no time attached to them at all. Like, if I think of being at my grandmothers place growing up, I'll remember a few moments, but no clue when any of those moments were in a likely 15 year gap.
Just as an example, random year. 4th grade I did a book parade for some hardy boys book, collected dead insects and disected a pig in science, and um, that's it for fourth grade. A few scattered memories, like each classroom, and one of the teachers (nothing for my other two teachers), but that's it for 4th grade. I'm almost 37 now, and assumed that was normal for childhood memories.
Granted, my adult memories aren't much better, especially if it was an uneventful year. 2005 was very eventful because I joined the navy that year and moved around a lot, so I can give you an almost complete narrative from January until December. That's not true of very many periods in my life. Several years in my twenties and on into my thirties have as few memories as that fourth grade example.
But what's normal?