I remember being mortally afraid of Santa Claus when I was a little kid, entirely due to his beard. My dad and my grandpa were the only bearded men I trusted. I don't know how old I was, though.
I do, however, know for certain that I have memories from the age of 1-2 years old, which I've been able to date by relaying these memories to older family members who also remember them and having them confirm when they happened. (For example, I remember passing a Christmas gift to my great grandmother, when I would have been 1.5 years old; she died not long after. And I remember the layout of the first apartment I ever lived in, which we left shortly before my 1st birthday.)
But I went through a severely traumatic experience at 3-4 years old that I believe caused me to retain older memories. I remember going through a conscious effort to retain as many memories as I could from before the event by repeatedly recalling them as frequently as I could, and although this probably caused them to become less accurate over time, I still remember them well enough that other people can recognize them and confirm them (the ones that involved other people, anyway).
I do, however, know for certain that I have memories from the age of 1-2 years old, which I've been able to date by relaying these memories to older family members who also remember them and having them confirm when they happened. (For example, I remember passing a Christmas gift to my great grandmother, when I would have been 1.5 years old; she died not long after. And I remember the layout of the first apartment I ever lived in, which we left shortly before my 1st birthday.)
But I went through a severely traumatic experience at 3-4 years old that I believe caused me to retain older memories. I remember going through a conscious effort to retain as many memories as I could from before the event by repeatedly recalling them as frequently as I could, and although this probably caused them to become less accurate over time, I still remember them well enough that other people can recognize them and confirm them (the ones that involved other people, anyway).