I never have the habit to put on a hat when it is sunny, a winter hat when it is cold. My parents didn't put a hat on us when we were younger, and in school we were running wild bare head during recess times.
It is very different in France. Ever since Awena was born, whenever I bring her out, I was reminded again and again to put a hat on her. People told me that babies' nook and cranium are fragile, that their skin are soft so they could get sunburn easily. Same goes to the young kids. I once saw a grandma insisted to put a hat on a 5 year old who would just take if of when the grandma walked away. Due to my own upbringing, I didn't pay much attention to bring a hat for Aelig, but you can see that I'm the weird one. Photo below shows a school outing and Aelig was the only one without hat.
I don't know how those Malaysian kids survive, playing sport under 30°C hot sun? Or we are just born differently?