The earliest memories of my childhood goes as far back as 2 years old. I quite vividly remember years 3 and 4. I remember walking through my old house and exploring every nook and cranny. I can almost exactly recall what went through my mind as a child in every step of my childhood. I also recall the sharp disdain I felt when it came time for toilet training when I was near 5. At the time, I didn't want to lose the feeling of being diapered, and as it would seem, those memories would eventually lead me here.
A few days ago, I asked several people about how far back they remember. The general consensus seems to be about 4 years old for their earliest memories. So, I thought I'd ask here.