We are not talking about the age of photons. We are talking about the age of the thing that emits/reflects photons. The confusion arose because the OP said "yo

We are not talking about the age of photons. We are talking about the age of the thing that emits/reflects photons. The confusion arose because the OP said "you are the oldest thing in the universe you can observe". They should have said "you are the most recent thing in the universe you can observe".