I can't remember when we changed, maybe a similar time, because I do remember Fahrenheit. Growing up, we weren't allowed stay home from school unless our temperature was over 99, and I still have trouble remember exactly what normal body temperature is in Celsius - 35.? Doesn't help that my normal temperature is low to start with
. I'm better on instant conversion of cooking temperatures than lower ones. Of yours I can see why you remember 16 =61 - a nice numeric palindrome.