There is debate in the scientific community about the age at which children form and retain long term memories. The best answer seems to be “it depends” based on the person and the intensity of the experience.
With that said, what is your earliest childhood memory(s) related to Thanksgiving?
I was the youngest of 4 kids and at Thanksgiving it would be the 6 of us from my immediate family along with my grandma on my mom’s side and an aunt & uncle on my mom’s side and their 2 kids. However, what I remember most was hearing every Thanksgiving (and Christmas) how grandma “isn’t doing well” and this is probably her last Thanksgiving. I was probably 5 or 6 when I first started hearing grandma is “dying” and I was told that by my mother every Holiday season, for years and years. My grandma passed away when I was in my early 40s.