700nm here! My Earliest memory happened before my second birthday. I am sure of it because it took place in (or rather near) the apartment we moved out of just before I turned two. In the memory, My dad and I are walking along the sidewalk very early in the morning. He was holding my hand. My head came up to his knees. We were going to wait at the corner of my street for my mom to come home from working night shift at the hospital. It is very brief, but vivid. It was cool outside, maybe autumn. There were no cars on the street. I don't even remember my mom arriving. I can't say that I felt like myself now. I just felt like a person.
This is similar to my earliest memory in that it is very vivid, but only for a short period of time. My memory however included a somewhat traumatizing event, which contributed to my remembrance. I can agree that I didn't feel like myself now. In my memory I just felt like a random person.