To be honest, I'm not all that good at reminding time frames to begin with. Ask me a question about something that happened in a book I read or a show I watched years ago and I can probably answer that; ask me a question about myself... chances are not as great. That said, I do have some hazy memories from when I was younger, albeit with no particular concept of a timeline and the only marker distinguishing them as the earliest being my place of residence at the time.
Is it strange that all of my early memories are tied to relatively unimportant events? No birthdays or Christmases; maybe Thanksgiving - but those have a serious tendency to blend together. No, I can remember playing Lego in my bedroom closet, my brother bloodying his lips rubbing them on his crib, losing my boomerang on the playground, and playing Pluto in a class play on the planets (back when Pluto still was one). I suppose on the important side you could count my Kindergarten graduation, though it really doesn't count as my earliest memory. If you asked me to order the others, however, I couldn't do it in a million years.
I guess it just speaks to the enigma that is our brain. By what arcane methods and arbitrary criteria does it chose to store and remove certain memories?